51402002730 has 64 divisors (see below), whose sum is σ = 133669630080. Its totient is φ = 12575160576.

The previous prime is 51402002713. The next prime is 51402002741. The reversal of 51402002730 is 3720020415.

It is a self number, because there is not a number n which added to its sum of digits gives 51402002730.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 340725 + ... + 467864.

It is an arithmetic number, because the mean of its divisors is an integer number (2088587970).

Almost surely, 2^51402002730 is an apocalyptic number.

51402002730 is an abundant number, since it is smaller than the sum of its proper divisors (82267627350).

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

51402002730 is a wasteful number, since it uses less digits than its factorization.

51402002730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808775.

The product of its (nonzero) digits is 1680, while the sum is 24.

The spelling of 51402002730 in words is "fifty-one billion, four hundred two million, two thousand, seven hundred thirty".