1557653655 has 16 divisors (see below), whose sum is σ = 2578186080. Its totient is φ = 802101888.

The previous prime is 1557653627. The next prime is 1557653689. The reversal of 1557653655 is 5563567551.

It is not a de Polignac number, because 1557653655 - 2¹⁰ = 1557652631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789972 + ... + 1790841.

It is an arithmetic number, because the mean of its divisors is an integer number (161136630).

Almost surely, 2^1557653655 is an apocalyptic number.

1557653655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1557653655 is a deficient number, since it is larger than the sum of its proper divisors (1020532425).

1557653655 is a wasteful number, since it uses less digits than its factorization.

1557653655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580850.

The product of its digits is 2362500, while the sum is 48.

The square root of 1557653655 is about 39467.1211896687. The cubic root of 1557653655 is about 1159.1962463758.

The spelling of 1557653655 in words is "one billion, five hundred fifty-seven million, six hundred fifty-three thousand, six hundred fifty-five".