57521346639 has 8 divisors (see below), whose sum is σ = 76696566960. Its totient is φ = 38346845376.

The previous prime is 57521346637. The next prime is 57521346647. The reversal of 57521346639 is 93664312575.

It is a happy number.

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

It is not a de Polignac number, because 57521346639 - 2¹ = 57521346637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57521346591 and 57521346600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57521346637) 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, 48189 + ... + 342585.

It is an arithmetic number, because the mean of its divisors is an integer number (9587070870).

Almost surely, 2^57521346639 is an apocalyptic number.

57521346639 is a deficient number, since it is larger than the sum of its proper divisors (19175220321).

57521346639 is a wasteful number, since it uses less digits than its factorization.

57521346639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359529.

The product of its digits is 4082400, while the sum is 51.

The spelling of 57521346639 in words is "fifty-seven billion, five hundred twenty-one million, three hundred forty-six thousand, six hundred thirty-nine".