51463905261 has 16 divisors (see below), whose sum is σ = 68781560640. Its totient is φ = 34227809280.

The previous prime is 51463905221. The next prime is 51463905289. The reversal of 51463905261 is 16250936415.

It is not a de Polignac number, because 51463905261 - 2¹⁸ = 51463643117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51463905221) 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, 8642061 + ... + 8648013.

It is an arithmetic number, because the mean of its divisors is an integer number (4298847540).

Almost surely, 2^51463905261 is an apocalyptic number.

It is an amenable number.

51463905261 is a deficient number, since it is larger than the sum of its proper divisors (17317655379).

51463905261 is a wasteful number, since it uses less digits than its factorization.

51463905261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12316.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 51463905261 in words is "fifty-one billion, four hundred sixty-three million, nine hundred five thousand, two hundred sixty-one".