1557040054 has 4 divisors (see below), whose sum is σ = 2335560084. Its totient is φ = 778520026.

The previous prime is 1557040033. The next prime is 1557040061. The reversal of 1557040054 is 4500407551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4500407551 = 1259 ⋅3574589.

It is a junction number, because it is equal to n+sod(n) for n = 1557039998 and 1557040025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389260012 + ... + 389260015.

It is an arithmetic number, because the mean of its divisors is an integer number (583890021).

Almost surely, 2^1557040054 is an apocalyptic number.

1557040054 is a deficient number, since it is larger than the sum of its proper divisors (778520030).

1557040054 is an equidigital number, since it uses as much as digits as its factorization.

1557040054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778520029.

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 1557040054 is about 39459.3468521718. The cubic root of 1557040054 is about 1159.0440136909.

The spelling of 1557040054 in words is "one billion, five hundred fifty-seven million, forty thousand, fifty-four".