51253355405402 has 8 divisors (see below), whose sum is σ = 76880334079956. Its totient is φ = 25626577378752.

The previous prime is 51253355405389. The next prime is 51253355405423. The reversal of 51253355405402 is 20450455335215.

It can be written as a sum of positive squares in 2 ways, for example, as 46299165313801 + 4954190091601 = 6804349^2 + 2225801^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49521743 + ... + 50546114.

Almost surely, 2^{51253355405402} is an apocalyptic number.

51253355405402 is a deficient number, since it is larger than the sum of its proper divisors (25626978674554).

51253355405402 is a wasteful number, since it uses less digits than its factorization.

51253355405402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100323952.

The product of its (nonzero) digits is 1800000, while the sum is 44.

The spelling of 51253355405402 in words is "fifty-one trillion, two hundred fifty-three billion, three hundred fifty-five million, four hundred five thousand, four hundred two".