51245354420 has 48 divisors (see below), whose sum is σ = 116404017408. Its totient is φ = 18837985920.

The previous prime is 51245354327. The next prime is 51245354429. The reversal of 51245354420 is 2445354215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245354429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375116 + ... + 493155.

It is an arithmetic number, because the mean of its divisors is an integer number (2425083696).

Almost surely, 2^51245354420 is an apocalyptic number.

It is an amenable number.

51245354420 is an abundant number, since it is smaller than the sum of its proper divisors (65158662988).

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

51245354420 is a wasteful number, since it uses less digits than its factorization.

51245354420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868520 (or 868518 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 51245354420 in words is "fifty-one billion, two hundred forty-five million, three hundred fifty-four thousand, four hundred twenty".