51424693490 has 16 divisors (see below), whose sum is σ = 98009416152. Its totient is φ = 19359884544.

The previous prime is 51424693483. The next prime is 51424693517. The reversal of 51424693490 is 9439642415.

It can be written as a sum of positive squares in 4 ways, for example, as 30236688769 + 21188004721 = 173887^2 + 145561^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151248929 + ... + 151249268.

Almost surely, 2^51424693490 is an apocalyptic number.

51424693490 is a deficient number, since it is larger than the sum of its proper divisors (46584722662).

51424693490 is a wasteful number, since it uses less digits than its factorization.

51424693490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302498221.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 51424693490 in words is "fifty-one billion, four hundred twenty-four million, six hundred ninety-three thousand, four hundred ninety".