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57401878837 = 471221316571
BaseRepresentation
bin110101011101011010…
…110010100100110101
312111011102202120112111
4311131122302210311
51420024340110322
642211533251021
74101320630302
oct653532624465
9174142676474
1057401878837
1122386956196
12b15b933a71
13554a3c44a4
142ac77c00a9
15175e5e4177
hexd5d6b2935

57401878837 has 4 divisors (see below), whose sum is σ = 58623195456. Its totient is φ = 56180562220.

The previous prime is 57401878817. The next prime is 57401878873. The reversal of 57401878837 is 73887810475.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57401878837 - 227 = 57267661109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57401878817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610658239 + ... + 610658332.

It is an arithmetic number, because the mean of its divisors is an integer number (14655798864).

Almost surely, 257401878837 is an apocalyptic number.

It is an amenable number.

57401878837 is a deficient number, since it is larger than the sum of its proper divisors (1221316619).

57401878837 is a wasteful number, since it uses less digits than its factorization.

57401878837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221316618.

The product of its (nonzero) digits is 10536960, while the sum is 58.

The spelling of 57401878837 in words is "fifty-seven billion, four hundred one million, eight hundred seventy-eight thousand, eight hundred thirty-seven".

Divisors: 1 47 1221316571 57401878837