61103390481 has 81 divisors (see below), whose sum is σ = 104688977211. Its totient is φ = 34242874848.

The previous prime is 61103390459. The next prime is 61103390561. The reversal of 61103390481 is 18409330116.

The square root of 61103390481 is 247191.

It is a perfect power (a square), and thus also a powerful number.

61103390481 is a `hidden beast` number, since 61 + 1 + 0 + 33 + 90 + 481 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7158682881 + 53944707600 = 84609^2 + 232260^2 .

It is not a de Polignac number, because 61103390481 - 2¹¹ = 61103388433 is a prime.

It is a super-2 number, since 2×61103390481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61103390681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 410089795 + ... + 410089943.

Almost surely, 2^61103390481 is an apocalyptic number.

61103390481 is the 247191-st square number.

61103390481 is the 123596-th centered octagonal number.

It is an amenable number.

61103390481 is a deficient number, since it is larger than the sum of its proper divisors (43585586730).

61103390481 is an equidigital number, since it uses as much as digits as its factorization.

61103390481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

Multiplying 61103390481 by its sum of digits (36), we get a square (2199722057316 = 1483146²).

It can be divided in two parts, 61103 and 390481, that added together give a square (451584 = 672²).

The spelling of 61103390481 in words is "sixty-one billion, one hundred three million, three hundred ninety thousand, four hundred eighty-one".