1657145073 has 16 divisors (see below), whose sum is σ = 2228990400. Its totient is φ = 1095057600.

The previous prime is 1657145053. The next prime is 1657145089. The reversal of 1657145073 is 3705417561.

It is not a de Polignac number, because 1657145073 - 2⁸ = 1657144817 is a prime.

It is a super-2 number, since 2×1657145073² = 5492259585936350658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1657145033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289483 + ... + 295151.

It is an arithmetic number, because the mean of its divisors is an integer number (139311900).

Almost surely, 2^1657145073 is an apocalyptic number.

It is an amenable number.

1657145073 is a deficient number, since it is larger than the sum of its proper divisors (571845327).

1657145073 is a wasteful number, since it uses less digits than its factorization.

1657145073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6512.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 1657145073 is about 40708.0467843890. The cubic root of 1657145073 is about 1183.3689686727.

The spelling of 1657145073 in words is "one billion, six hundred fifty-seven million, one hundred forty-five thousand, seventy-three".