653172488 has 8 divisors (see below), whose sum is σ = 1224698430. Its totient is φ = 326586240.

The previous prime is 653172479. The next prime is 653172493. The reversal of 653172488 is 884271356.

It can be written as a sum of positive squares in only one way, i.e., 605258404 + 47914084 = 24602^2 + 6922^2 .

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

It is a super-2 number, since 2×653172488² = 853268598160220288, which 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, 40823273 + ... + 40823288.

Almost surely, 2^653172488 is an apocalyptic number.

It is an amenable number.

653172488 is a deficient number, since it is larger than the sum of its proper divisors (571525942).

653172488 is a wasteful number, since it uses less digits than its factorization.

653172488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81646567 (or 81646563 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 653172488 is about 25557.2394440401. The cubic root of 653172488 is about 867.6461177852.

The spelling of 653172488 in words is "six hundred fifty-three million, one hundred seventy-two thousand, four hundred eighty-eight".