1557752045 has 8 divisors (see below), whose sum is σ = 1869605496. Its totient is φ = 1245999616.

The previous prime is 1557752033. The next prime is 1557752093. The reversal of 1557752045 is 5402577551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 251507881 + 1306244164 = 15859^2 + 36142^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1557752045 - 2⁴ = 1557752029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1557751993 and 1557752011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14309 + ... + 57621.

It is an arithmetic number, because the mean of its divisors is an integer number (233700687).

Almost surely, 2^1557752045 is an apocalyptic number.

It is an amenable number.

1557752045 is a deficient number, since it is larger than the sum of its proper divisors (311853451).

1557752045 is an equidigital number, since it uses as much as digits as its factorization.

1557752045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50511.

The product of its (nonzero) digits is 245000, while the sum is 41.

The square root of 1557752045 is about 39468.3676505629. The cubic root of 1557752045 is about 1159.2206529391.

The spelling of 1557752045 in words is "one billion, five hundred fifty-seven million, seven hundred fifty-two thousand, forty-five".