51557575476 has 192 divisors, whose sum is σ = 143185674240. Its totient is φ = 14265072000.

The previous prime is 51557575471. The next prime is 51557575483. The reversal of 51557575476 is 67457575515.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51557575471) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21068485 + ... + 21070931.

It is an arithmetic number, because the mean of its divisors is an integer number (745758720).

Almost surely, 2^51557575476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51557575476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71592837120).

51557575476 is an abundant number, since it is smaller than the sum of its proper divisors (91628098764).

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

51557575476 is a wasteful number, since it uses less digits than its factorization.

51557575476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786 (or 2784 counting only the distinct ones).

The product of its digits is 25725000, while the sum is 57.

The spelling of 51557575476 in words is "fifty-one billion, five hundred fifty-seven million, five hundred seventy-five thousand, four hundred seventy-six".