210161778996 has 96 divisors (see below), whose sum is σ = 583475090688. Its totient is φ = 58215168000.

The previous prime is 210161778971. The next prime is 210161779001. The reversal of 210161778996 is 699877161012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1661755 + ... + 1783746.

It is an arithmetic number, because the mean of its divisors is an integer number (6077865528).

Almost surely, 2^210161778996 is an apocalyptic number.

210161778996 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

210161778996 is an abundant number, since it is smaller than the sum of its proper divisors (373313311692).

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

210161778996 is a wasteful number, since it uses less digits than its factorization.

210161778996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445561 (or 3445559 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 57.

The spelling of 210161778996 in words is "two hundred ten billion, one hundred sixty-one million, seven hundred seventy-eight thousand, nine hundred ninety-six".