1215787668604 has 24 divisors (see below), whose sum is σ = 2196374629680. Its totient is φ = 588502274304.

The previous prime is 1215787668587. The next prime is 1215787668617. The reversal of 1215787668604 is 4068667875121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31257259 + ... + 31296130.

It is an arithmetic number, because the mean of its divisors is an integer number (91515609570).

Almost surely, 2^{1215787668604} is an apocalyptic number.

It is an amenable number.

1215787668604 is a deficient number, since it is larger than the sum of its proper divisors (980586961076).

1215787668604 is a wasteful number, since it uses less digits than its factorization.

1215787668604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62553549 (or 62553547 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 1215787668604 in words is "one trillion, two hundred fifteen billion, seven hundred eighty-seven million, six hundred sixty-eight thousand, six hundred four".