101980656 has 30 divisors (see below), whose sum is σ = 285404600. Its totient is φ = 33993504.

The previous prime is 101980651. The next prime is 101980667. The reversal of 101980656 is 656089101.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 101980656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101980651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 353956 + ... + 354243.

Almost surely, 2^101980656 is an apocalyptic number.

101980656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

101980656 is an abundant number, since it is smaller than the sum of its proper divisors (183423944).

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

101980656 is a wasteful number, since it uses less digits than its factorization.

101980656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708213 (or 708204 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 101980656 is about 10098.5472222493. The cubic root of 101980656 is about 467.2033345215.

The spelling of 101980656 in words is "one hundred one million, nine hundred eighty thousand, six hundred fifty-six".