1657045473 has 8 divisors (see below), whose sum is σ = 2215075200. Its totient is φ = 1101856368.

The previous prime is 1657045457. The next prime is 1657045493. The reversal of 1657045473 is 3745407561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1657045473 - 2⁴ = 1657045457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1657045493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708793 + ... + 711126.

It is an arithmetic number, because the mean of its divisors is an integer number (276884400).

Almost surely, 2^1657045473 is an apocalyptic number.

It is an amenable number.

1657045473 is a deficient number, since it is larger than the sum of its proper divisors (558029727).

1657045473 is a wasteful number, since it uses less digits than its factorization.

1657045473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420311.

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 1657045473 is about 40706.8234206503. The cubic root of 1657045473 is about 1183.3452600442.

The spelling of 1657045473 in words is "one billion, six hundred fifty-seven million, forty-five thousand, four hundred seventy-three".