981980655 has 8 divisors (see below), whose sum is σ = 1571169072. Its totient is φ = 523723008.

The previous prime is 981980621. The next prime is 981980663. The reversal of 981980655 is 556089189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 981980655 - 2⁸ = 981980399 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 981980598 and 981980607.

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, 32732674 + ... + 32732703.

It is an arithmetic number, because the mean of its divisors is an integer number (196396134).

Almost surely, 2^981980655 is an apocalyptic number.

981980655 is a deficient number, since it is larger than the sum of its proper divisors (589188417).

981980655 is a wasteful number, since it uses less digits than its factorization.

981980655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65465385.

The product of its (nonzero) digits is 777600, while the sum is 51.

The square root of 981980655 is about 31336.5705685865. The cubic root of 981980655 is about 993.9571086864.

The spelling of 981980655 in words is "nine hundred eighty-one million, nine hundred eighty thousand, six hundred fifty-five".