1672251656 has 8 divisors (see below), whose sum is σ = 3135471870. Its totient is φ = 836125824.

The previous prime is 1672251653. The next prime is 1672251671. The reversal of 1672251656 is 6561522761.

It can be written as a sum of positive squares in only one way, i.e., 1153960900 + 518290756 = 33970^2 + 22766^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1672251653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104515721 + ... + 104515736.

Almost surely, 2^1672251656 is an apocalyptic number.

It is an amenable number.

1672251656 is a deficient number, since it is larger than the sum of its proper divisors (1463220214).

1672251656 is a wasteful number, since it uses less digits than its factorization.

1672251656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209031463 (or 209031459 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 1672251656 is about 40893.1737090679. The cubic root of 1672251656 is about 1186.9539723623.

The spelling of 1672251656 in words is "one billion, six hundred seventy-two million, two hundred fifty-one thousand, six hundred fifty-six".