51574574016 has 840 divisors, whose sum is σ = 191850971136. Its totient is φ = 13403335680.

The previous prime is 51574573991. The next prime is 51574574033. The reversal of 51574574016 is 61047547515.

51574574016 is a `hidden beast` number, since 5 + 1 + 5 + 74 + 574 + 0 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 406098945 + ... + 406099071.

Almost surely, 2^51574574016 is an apocalyptic number.

51574574016 is a gapful number since it is divisible by the number (56) 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 51574574016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95925485568).

51574574016 is an abundant number, since it is smaller than the sum of its proper divisors (140276397120).

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

51574574016 is a wasteful number, since it uses less digits than its factorization.

51574574016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 51574574016 in words is "fifty-one billion, five hundred seventy-four million, five hundred seventy-four thousand, sixteen".