634153041990 has 96 divisors (see below), whose sum is σ = 1793209332096. Its totient is φ = 154553644800.

The previous prime is 634153041983. The next prime is 634153042013. The reversal of 634153041990 is 99140351436.

634153041990 is a `hidden beast` number, since 63 + 41 + 53 + 0 + 419 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 2565054 + ... + 2801393.

It is an arithmetic number, because the mean of its divisors is an integer number (18679263876).

Almost surely, 2^634153041990 is an apocalyptic number.

634153041990 is an abundant number, since it is smaller than the sum of its proper divisors (1159056290106).

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

634153041990 is a wasteful number, since it uses less digits than its factorization.

634153041990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366574 (or 5366571 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 634153041990 in words is "six hundred thirty-four billion, one hundred fifty-three million, forty-one thousand, nine hundred ninety".