1657557542 has 16 divisors (see below), whose sum is σ = 2507131440. Its totient is φ = 821872992.

The previous prime is 1657557527. The next prime is 1657557589. The reversal of 1657557542 is 2457557561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127328 + ... + 139740.

It is an arithmetic number, because the mean of its divisors is an integer number (156695715).

Almost surely, 2^1657557542 is an apocalyptic number.

1657557542 is a deficient number, since it is larger than the sum of its proper divisors (849573898).

1657557542 is a wasteful number, since it uses less digits than its factorization.

1657557542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12967.

The product of its digits is 1470000, while the sum is 47.

The square root of 1657557542 is about 40713.1126542788. The cubic root of 1657557542 is about 1183.4671420376.

The spelling of 1657557542 in words is "one billion, six hundred fifty-seven million, five hundred fifty-seven thousand, five hundred forty-two".