61323378481 has 16 divisors (see below), whose sum is σ = 65405667456. Its totient is φ = 57366182016.

The previous prime is 61323378461. The next prime is 61323378497. The reversal of 61323378481 is 18487332316.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61323378481 - 2⁷ = 61323378353 is a prime.

It is a super-2 number, since 2×61323378481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61323378421) 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 15 ways as a sum of consecutive naturals, for example, 301186 + ... + 461908.

It is an arithmetic number, because the mean of its divisors is an integer number (4087854216).

Almost surely, 2^61323378481 is an apocalyptic number.

It is an amenable number.

61323378481 is a deficient number, since it is larger than the sum of its proper divisors (4082288975).

61323378481 is a wasteful number, since it uses less digits than its factorization.

61323378481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161112.

The product of its digits is 580608, while the sum is 46.

The spelling of 61323378481 in words is "sixty-one billion, three hundred twenty-three million, three hundred seventy-eight thousand, four hundred eighty-one".