51404363522 has 6 divisors (see below), whose sum is σ = 77107026243. Its totient is φ = 25702021442.

The previous prime is 51404363509. The next prime is 51404363531. The reversal of 51404363522 is 22536340415.

It can be written as a sum of positive squares in only one way, i.e., 25702181761 + 25702181761 = 160319^2 + 160319^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=160319.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 240479 + ... + 400797.

Almost surely, 2^51404363522 is an apocalyptic number.

51404363522 is a deficient number, since it is larger than the sum of its proper divisors (25702662721).

51404363522 is an frugal number, since it uses more digits than its factorization.

51404363522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320640 (or 160321 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 51404363522 in words is "fifty-one billion, four hundred four million, three hundred sixty-three thousand, five hundred twenty-two".