51042743515 has 16 divisors (see below), whose sum is σ = 64650769920. Its totient is φ = 38579591520.

The previous prime is 51042743501. The next prime is 51042743519. The reversal of 51042743515 is 51534724015.

It is not a de Polignac number, because 51042743515 - 2⁷ = 51042743387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51042743519) 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, 697141 + ... + 766870.

It is an arithmetic number, because the mean of its divisors is an integer number (4040673120).

Almost surely, 2^51042743515 is an apocalyptic number.

51042743515 is a deficient number, since it is larger than the sum of its proper divisors (13608026405).

51042743515 is a wasteful number, since it uses less digits than its factorization.

51042743515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464402.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 51042743515 in words is "fifty-one billion, forty-two million, seven hundred forty-three thousand, five hundred fifteen".