15205132772 has 6 divisors (see below), whose sum is σ = 26608982358. Its totient is φ = 7602566384.

The previous prime is 15205132757. The next prime is 15205132819. The reversal of 15205132772 is 27723150251.

It can be written as a sum of positive squares in only one way, i.e., 13899466816 + 1305665956 = 117896^2 + 36134^2 .

It is a super-2 number, since 2×15205132772² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1900641593 + ... + 1900641600.

It is an arithmetic number, because the mean of its divisors is an integer number (4434830393).

Almost surely, 2^15205132772 is an apocalyptic number.

It is an amenable number.

15205132772 is a deficient number, since it is larger than the sum of its proper divisors (11403849586).

15205132772 is a wasteful number, since it uses less digits than its factorization.

15205132772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801283197 (or 3801283195 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 15205132772 in words is "fifteen billion, two hundred five million, one hundred thirty-two thousand, seven hundred seventy-two".