1657575492 has 12 divisors (see below), whose sum is σ = 3867676176. Its totient is φ = 552525160.

The previous prime is 1657575473. The next prime is 1657575499. The reversal of 1657575492 is 2945757561.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1657575499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69065634 + ... + 69065657.

It is an arithmetic number, because the mean of its divisors is an integer number (322306348).

Almost surely, 2^1657575492 is an apocalyptic number.

1657575492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1657575492 is an abundant number, since it is smaller than the sum of its proper divisors (2210100684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1657575492 is a wasteful number, since it uses less digits than its factorization.

1657575492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138131298 (or 138131296 counting only the distinct ones).

The product of its digits is 2646000, while the sum is 51.

The square root of 1657575492 is about 40713.3330986300. Note that the first 3 decimals coincide. The cubic root of 1657575492 is about 1183.4714140177.

The spelling of 1657575492 in words is "one billion, six hundred fifty-seven million, five hundred seventy-five thousand, four hundred ninety-two".