634727544540 has 48 divisors (see below), whose sum is σ = 1777272135072. Its totient is φ = 169257344256.

The previous prime is 634727544497. The next prime is 634727544551. The reversal of 634727544540 is 45445727436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5190582 + ... + 5311458.

It is an arithmetic number, because the mean of its divisors is an integer number (37026502814).

Almost surely, 2^634727544540 is an apocalyptic number.

634727544540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634727544540 is an abundant number, since it is smaller than the sum of its proper divisors (1142544590532).

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

634727544540 is a wasteful number, since it uses less digits than its factorization.

634727544540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208406 (or 208404 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 51.

The spelling of 634727544540 in words is "six hundred thirty-four billion, seven hundred twenty-seven million, five hundred forty-four thousand, five hundred forty".