61626797413 has 6 divisors (see below), whose sum is σ = 61998057926. Its totient is φ = 61257746952.

The previous prime is 61626797381. The next prime is 61626797429. The reversal of 61626797413 is 31479762616.

It can be written as a sum of positive squares in only one way, i.e., 61584378244 + 42419169 = 248162^2 + 6513^2 .

It is not a de Polignac number, because 61626797413 - 2⁵ = 61626797381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61626797213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1076970 + ... + 1132747.

Almost surely, 2^61626797413 is an apocalyptic number.

It is an amenable number.

61626797413 is a deficient number, since it is larger than the sum of its proper divisors (371260513).

61626797413 is an equidigital number, since it uses as much as digits as its factorization.

61626797413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210051 (or 2209884 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 52.

The spelling of 61626797413 in words is "sixty-one billion, six hundred twenty-six million, seven hundred ninety-seven thousand, four hundred thirteen".