61564413513 has 32 divisors (see below), whose sum is σ = 93619003392. Its totient is φ = 35757216000.

The previous prime is 61564413499. The next prime is 61564413523. The reversal of 61564413513 is 31531446516.

It is not a de Polignac number, because 61564413513 - 2²² = 61560219209 is a prime.

It is a super-2 number, since 2×61564413513² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61564413523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 810163 + ... + 882888.

It is an arithmetic number, because the mean of its divisors is an integer number (2925593856).

Almost surely, 2^61564413513 is an apocalyptic number.

It is an amenable number.

61564413513 is a deficient number, since it is larger than the sum of its proper divisors (32054589879).

61564413513 is a wasteful number, since it uses less digits than its factorization.

61564413513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693125.

The product of its digits is 129600, while the sum is 39.

The spelling of 61564413513 in words is "sixty-one billion, five hundred sixty-four million, four hundred thirteen thousand, five hundred thirteen".