61685326680 has 64 divisors (see below), whose sum is σ = 187398489600. Its totient is φ = 16241197440.

The previous prime is 61685326621. The next prime is 61685326739. The reversal of 61685326680 is 8662358616.

It is an interprime number because it is at equal distance from previous prime (61685326621) and next prime (61685326739).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3243966 + ... + 3262925.

It is an arithmetic number, because the mean of its divisors is an integer number (2928101400).

Almost surely, 2^61685326680 is an apocalyptic number.

61685326680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61685326680 is an abundant number, since it is smaller than the sum of its proper divisors (125713162920).

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

61685326680 is a wasteful number, since it uses less digits than its factorization.

61685326680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506984 (or 6506980 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 61685326680 in words is "sixty-one billion, six hundred eighty-five million, three hundred twenty-six thousand, six hundred eighty".