97177289490 has 128 divisors (see below), whose sum is σ = 262063226880. Its totient is φ = 25622364096.

The previous prime is 97177289453. The next prime is 97177289501. The reversal of 97177289490 is 9498277179.

97177289490 is a `hidden beast` number, since 9 + 71 + 7 + 72 + 8 + 9 + 490 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20660479 + ... + 20665181.

It is an arithmetic number, because the mean of its divisors is an integer number (2047368960).

Almost surely, 2^97177289490 is an apocalyptic number.

97177289490 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 97177289490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131031613440).

97177289490 is an abundant number, since it is smaller than the sum of its proper divisors (164885937390).

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

97177289490 is a wasteful number, since it uses less digits than its factorization.

97177289490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565 (or 5559 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 63.

The spelling of 97177289490 in words is "ninety-seven billion, one hundred seventy-seven million, two hundred eighty-nine thousand, four hundred ninety".