1612651257 has 12 divisors (see below), whose sum is σ = 2662154560. Its totient is φ = 921514968.

The previous prime is 1612651219. The next prime is 1612651283. The reversal of 1612651257 is 7521562161.

1612651257 is a `hidden beast` number, since 16 + 126 + 512 + 5 + 7 = 666.

1612651257 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1612651257 - 2¹⁴ = 1612634873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612651057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12798757 + ... + 12798882.

Almost surely, 2^1612651257 is an apocalyptic number.

It is an amenable number.

1612651257 is a deficient number, since it is larger than the sum of its proper divisors (1049503303).

1612651257 is a wasteful number, since it uses less digits than its factorization.

1612651257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25597652 (or 25597649 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 1612651257 is about 40157.8293362577. The cubic root of 1612651257 is about 1172.6817140847.

The spelling of 1612651257 in words is "one billion, six hundred twelve million, six hundred fifty-one thousand, two hundred fifty-seven".