3972136552 has 8 divisors (see below), whose sum is σ = 7447756050. Its totient is φ = 1986068272.

The previous prime is 3972136541. The next prime is 3972136559. The reversal of 3972136552 is 2556312793.

It can be written as a sum of positive squares in only one way, i.e., 3550491396 + 421645156 = 59586^2 + 20534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3972136499 and 3972136508.

It is not an unprimeable number, because it can be changed into a prime (3972136559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248258527 + ... + 248258542.

Almost surely, 2^3972136552 is an apocalyptic number.

It is an amenable number.

3972136552 is a deficient number, since it is larger than the sum of its proper divisors (3475619498).

3972136552 is a wasteful number, since it uses less digits than its factorization.

3972136552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496517075 (or 496517071 counting only the distinct ones).

The product of its digits is 340200, while the sum is 43.

The square root of 3972136552 is about 63024.8883537290. Note that the first 3 decimals coincide. The cubic root of 3972136552 is about 1583.7065880452.

The spelling of 3972136552 in words is "three billion, nine hundred seventy-two million, one hundred thirty-six thousand, five hundred fifty-two".