97749551536 has 160 divisors (see below), whose sum is σ = 234877744640. Its totient is φ = 38375866368.

The previous prime is 97749551519. The next prime is 97749551567. The reversal of 97749551536 is 63515594779.

It is a happy number.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169409680 + ... + 169410256.

It is an arithmetic number, because the mean of its divisors is an integer number (1467985904).

Almost surely, 2^97749551536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97749551536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117438872320).

97749551536 is an abundant number, since it is smaller than the sum of its proper divisors (137128193104).

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

97749551536 is a wasteful number, since it uses less digits than its factorization.

97749551536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1285 counting only the distinct ones).

The product of its digits is 35721000, while the sum is 61.

The spelling of 97749551536 in words is "ninety-seven billion, seven hundred forty-nine million, five hundred fifty-one thousand, five hundred thirty-six".