1557054618 has 16 divisors (see below), whose sum is σ = 3558982080. Its totient is φ = 444872736.

The previous prime is 1557054613. The next prime is 1557054643. The reversal of 1557054618 is 8164507551.

1557054618 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 37072729 = 1557054618 / (1 + 5 + 5 + 7 + 0 + 5 + 4 + 6 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 1557054618.

It is not an unprimeable number, because it can be changed into a prime (1557054613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18536323 + ... + 18536406.

It is an arithmetic number, because the mean of its divisors is an integer number (222436380).

Almost surely, 2^1557054618 is an apocalyptic number.

1557054618 is an abundant number, since it is smaller than the sum of its proper divisors (2001927462).

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

1557054618 is a wasteful number, since it uses less digits than its factorization.

1557054618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37072741.

The product of its (nonzero) digits is 168000, while the sum is 42.

The square root of 1557054618 is about 39459.5313961025. The cubic root of 1557054618 is about 1159.0476274418.

The spelling of 1557054618 in words is "one billion, five hundred fifty-seven million, fifty-four thousand, six hundred eighteen".