57123211778 has 8 divisors (see below), whose sum is σ = 85686180672. Its totient is φ = 28561151556.

The previous prime is 57123211757. The next prime is 57123211787. The reversal of 57123211778 is 87711232175.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×57123211778² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38750 + ... + 340217.

It is an arithmetic number, because the mean of its divisors is an integer number (10710772584).

Almost surely, 2^57123211778 is an apocalyptic number.

57123211778 is a deficient number, since it is larger than the sum of its proper divisors (28562968894).

57123211778 is a wasteful number, since it uses less digits than its factorization.

57123211778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454336.

The product of its digits is 164640, while the sum is 44.

The spelling of 57123211778 in words is "fifty-seven billion, one hundred twenty-three million, two hundred eleven thousand, seven hundred seventy-eight".