1012724518638 has 32 divisors (see below), whose sum is σ = 2314864613376. Its totient is φ = 289341648288.

The previous prime is 1012724518549. The next prime is 1012724518639. The reversal of 1012724518638 is 8368154272101.

It is a super-2 number, since 2×1012724518638² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012724518639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240995 + ... + 1888257.

It is an arithmetic number, because the mean of its divisors is an integer number (72339519168).

Almost surely, 2^{1012724518638} is an apocalyptic number.

1012724518638 is an abundant number, since it is smaller than the sum of its proper divisors (1302140094738).

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

1012724518638 is a wasteful number, since it uses less digits than its factorization.

1012724518638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684528.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 1012724518638 in words is "one trillion, twelve billion, seven hundred twenty-four million, five hundred eighteen thousand, six hundred thirty-eight".