1215157679432 has 32 divisors (see below), whose sum is σ = 2517334329600. Its totient is φ = 546976345344.

The previous prime is 1215157679423. The next prime is 1215157679471. The reversal of 1215157679432 is 2349767515121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194235632 + ... + 194241887.

It is an arithmetic number, because the mean of its divisors is an integer number (78666697800).

Almost surely, 2^{1215157679432} is an apocalyptic number.

It is an amenable number.

1215157679432 is an abundant number, since it is smaller than the sum of its proper divisors (1302176650168).

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

1215157679432 is a wasteful number, since it uses less digits than its factorization.

1215157679432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388477565 (or 388477561 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 53.

The spelling of 1215157679432 in words is "one trillion, two hundred fifteen billion, one hundred fifty-seven million, six hundred seventy-nine thousand, four hundred thirty-two".