57061491984 has 200 divisors, whose sum is σ = 199848958848. Its totient is φ = 15344225280.

The previous prime is 57061491979. The next prime is 57061492013. The reversal of 57061491984 is 48919416075.

57061491984 is a `hidden beast` number, since 5 + 7 + 0 + 61 + 491 + 98 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 57061491984.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30772 + ... + 339219.

Almost surely, 2^57061491984 is an apocalyptic number.

57061491984 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57061491984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99924479424).

57061491984 is an abundant number, since it is smaller than the sum of its proper divisors (142787466864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57061491984 is a wasteful number, since it uses less digits than its factorization.

57061491984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370035 (or 370020 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 57061491984 in words is "fifty-seven billion, sixty-one million, four hundred ninety-one thousand, nine hundred eighty-four".