51450545402 has 8 divisors (see below), whose sum is σ = 79837053300. Its totient is φ = 24838194304.

The previous prime is 51450545401. The next prime is 51450545411. The reversal of 51450545402 is 20454505415.

It can be written as a sum of positive squares in 2 ways, for example, as 47798639641 + 3651905761 = 218629^2 + 60431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51450545401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443539127 + ... + 443539242.

Almost surely, 2^51450545402 is an apocalyptic number.

51450545402 is a deficient number, since it is larger than the sum of its proper divisors (28386507898).

51450545402 is a wasteful number, since it uses less digits than its factorization.

51450545402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887078400.

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 51450545402 in words is "fifty-one billion, four hundred fifty million, five hundred forty-five thousand, four hundred two".