15505851832772 has 24 divisors (see below), whose sum is σ = 31014614246784. Its totient is φ = 6644741375232.

The previous prime is 15505851832721. The next prime is 15505851832787. The reversal of 15505851832772 is 27723815850551.

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, 25683608 + ... + 26280399.

It is an arithmetic number, because the mean of its divisors is an integer number (1292275593616).

Almost surely, 2^{15505851832772} is an apocalyptic number.

It is an amenable number.

15505851832772 is an abundant number, since it is smaller than the sum of its proper divisors (15508762414012).

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

15505851832772 is a wasteful number, since it uses less digits than its factorization.

15505851832772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51974675 (or 51974673 counting only the distinct ones).

The product of its (nonzero) digits is 23520000, while the sum is 59.

The spelling of 15505851832772 in words is "fifteen trillion, five hundred five billion, eight hundred fifty-one million, eight hundred thirty-two thousand, seven hundred seventy-two".