51540663435 has 16 divisors (see below), whose sum is σ = 82521851424. Its totient is φ = 27469423872.

The previous prime is 51540663431. The next prime is 51540663437. The reversal of 51540663435 is 53436604515.

It is not a de Polignac number, because 51540663435 - 2² = 51540663431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51540663431) 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, 1160602 + ... + 1204191.

It is an arithmetic number, because the mean of its divisors is an integer number (5157615714).

Almost surely, 2^51540663435 is an apocalyptic number.

51540663435 is a deficient number, since it is larger than the sum of its proper divisors (30981187989).

51540663435 is a wasteful number, since it uses less digits than its factorization.

51540663435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366254.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 51540663435 in words is "fifty-one billion, five hundred forty million, six hundred sixty-three thousand, four hundred thirty-five".