15555334972 has 6 divisors (see below), whose sum is σ = 27221836208. Its totient is φ = 7777667484.

The previous prime is 15555334961. The next prime is 15555334973. The reversal of 15555334972 is 27943355551.

It is a super-2 number, since 2×15555334972² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15555334973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1944416868 + ... + 1944416875.

Almost surely, 2^15555334972 is an apocalyptic number.

It is an amenable number.

15555334972 is a deficient number, since it is larger than the sum of its proper divisors (11666501236).

15555334972 is a wasteful number, since it uses less digits than its factorization.

15555334972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888833747 (or 3888833745 counting only the distinct ones).

The product of its digits is 2835000, while the sum is 49.

The spelling of 15555334972 in words is "fifteen billion, five hundred fifty-five million, three hundred thirty-four thousand, nine hundred seventy-two".