97865270820 has 144 divisors (see below), whose sum is σ = 317783950848. Its totient is φ = 25255514880.

The previous prime is 97865270773. The next prime is 97865270843. The reversal of 97865270820 is 2807256879.

It is a happy number.

97865270820 is a `hidden beast` number, since 97 + 8 + 6 + 527 + 0 + 8 + 20 = 666.

It is a super-2 number, since 2×97865270820² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174129 + ... + 475448.

It is an arithmetic number, because the mean of its divisors is an integer number (2206832992).

Almost surely, 2^97865270820 is an apocalyptic number.

97865270820 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97865270820 is an abundant number, since it is smaller than the sum of its proper divisors (219918680028).

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

97865270820 is a wasteful number, since it uses less digits than its factorization.

97865270820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649632 (or 649618 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 97865270820 in words is "ninety-seven billion, eight hundred sixty-five million, two hundred seventy thousand, eight hundred twenty".