57508401987 has 24 divisors (see below), whose sum is σ = 84919798080. Its totient is φ = 37485745920.

The previous prime is 57508401961. The next prime is 57508402013. The reversal of 57508401987 is 78910480575.

57508401987 is a `hidden beast` number, since 5 + 7 + 508 + 40 + 1 + 98 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (57508401961) and next prime (57508402013).

It is not a de Polignac number, because 57508401987 - 2⁷ = 57508401859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57508401887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359437 + ... + 494177.

It is an arithmetic number, because the mean of its divisors is an integer number (3538324920).

Almost surely, 2^57508401987 is an apocalyptic number.

57508401987 is a deficient number, since it is larger than the sum of its proper divisors (27411396093).

57508401987 is a wasteful number, since it uses less digits than its factorization.

57508401987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135803 (or 135800 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 57508401987 in words is "fifty-seven billion, five hundred eight million, four hundred one thousand, nine hundred eighty-seven".