51878135610 has 384 divisors, whose sum is σ = 172234782720. Its totient is φ = 10969572096.

The previous prime is 51878135581. The next prime is 51878135707. The reversal of 51878135610 is 1653187815.

51878135610 is a `hidden beast` number, since 5 + 1 + 8 + 7 + 81 + 3 + 561 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13895304 + ... + 13899036.

It is an arithmetic number, because the mean of its divisors is an integer number (448528080).

Almost surely, 2^51878135610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51878135610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86117391360).

51878135610 is an abundant number, since it is smaller than the sum of its proper divisors (120356647110).

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

51878135610 is a wasteful number, since it uses less digits than its factorization.

51878135610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824 (or 3812 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 51878135610 in words is "fifty-one billion, eight hundred seventy-eight million, one hundred thirty-five thousand, six hundred ten".