61023659520 has 80 divisors (see below), whose sum is σ = 195085036080. Its totient is φ = 16272973824.

The previous prime is 61023659513. The next prime is 61023659537. The reversal of 61023659520 is 2595632016.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3965215 + ... + 3980574.

It is an arithmetic number, because the mean of its divisors is an integer number (2438562951).

Almost surely, 2^61023659520 is an apocalyptic number.

61023659520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61023659520 is an abundant number, since it is smaller than the sum of its proper divisors (134061376560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61023659520 is an equidigital number, since it uses as much as digits as its factorization.

61023659520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945815 (or 7945799 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 61023659520 in words is "sixty-one billion, twenty-three million, six hundred fifty-nine thousand, five hundred twenty".