1557755652 has 12 divisors (see below), whose sum is σ = 3634763216. Its totient is φ = 519251880.

The previous prime is 1557755651. The next prime is 1557755653. The reversal of 1557755652 is 2565577551.

It is an interprime number because it is at equal distance from previous prime (1557755651) and next prime (1557755653).

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 (1557755651) 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, 64906474 + ... + 64906497.

Almost surely, 2^1557755652 is an apocalyptic number.

1557755652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1557755652 is an abundant number, since it is smaller than the sum of its proper divisors (2077007564).

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

1557755652 is a wasteful number, since it uses less digits than its factorization.

1557755652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129812978 (or 129812976 counting only the distinct ones).

The product of its digits is 1837500, while the sum is 48.

The square root of 1557755652 is about 39468.4133453576. The cubic root of 1557755652 is about 1159.2215476698.

The spelling of 1557755652 in words is "one billion, five hundred fifty-seven million, seven hundred fifty-five thousand, six hundred fifty-two".