57145856515 has 16 divisors (see below), whose sum is σ = 74874086496. Its totient is φ = 41524531200.

The previous prime is 57145856513. The next prime is 57145856543. The reversal of 57145856515 is 51565854175.

It is not a de Polignac number, because 57145856515 - 2¹ = 57145856513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57145856513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387156 + ... + 513985.

It is an arithmetic number, because the mean of its divisors is an integer number (4679630406).

Almost surely, 2^57145856515 is an apocalyptic number.

57145856515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

57145856515 is a deficient number, since it is larger than the sum of its proper divisors (17728229981).

57145856515 is a wasteful number, since it uses less digits than its factorization.

57145856515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902310.

The product of its digits is 4200000, while the sum is 52.

The spelling of 57145856515 in words is "fifty-seven billion, one hundred forty-five million, eight hundred fifty-six thousand, five hundred fifteen".