61576830481 has 4 divisors (see below), whose sum is σ = 61577396964. Its totient is φ = 61576264000.

The previous prime is 61576830473. The next prime is 61576830493. The reversal of 61576830481 is 18403867516.

It is a happy number.

61576830481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 49232509456 + 12344321025 = 221884^2 + 111105^2 .

It is a cyclic number.

It is not a de Polignac number, because 61576830481 - 2³ = 61576830473 is a prime.

It is a super-2 number, since 2×61576830481² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61576830401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63220 + ... + 356581.

It is an arithmetic number, because the mean of its divisors is an integer number (15394349241).

Almost surely, 2^61576830481 is an apocalyptic number.

It is an amenable number.

61576830481 is a deficient number, since it is larger than the sum of its proper divisors (566483).

61576830481 is a wasteful number, since it uses less digits than its factorization.

61576830481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566482.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 61576830481 in words is "sixty-one billion, five hundred seventy-six million, eight hundred thirty thousand, four hundred eighty-one".