65271234771561 has 64 divisors (see below), whose sum is σ = 108100615884800. Its totient is φ = 34110975902976.

The previous prime is 65271234771557. The next prime is 65271234771581. The reversal of 65271234771561 is 16517743217256.

It is not a de Polignac number, because 65271234771561 - 2² = 65271234771557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65271234771581) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 626838660 + ... + 626942778.

It is an arithmetic number, because the mean of its divisors is an integer number (1689072123200).

Almost surely, 2^{65271234771561} is an apocalyptic number.

It is an amenable number.

65271234771561 is a deficient number, since it is larger than the sum of its proper divisors (42829381113239).

65271234771561 is a wasteful number, since it uses less digits than its factorization.

65271234771561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125318.

The product of its digits is 14817600, while the sum is 57.

The spelling of 65271234771561 in words is "sixty-five trillion, two hundred seventy-one billion, two hundred thirty-four million, seven hundred seventy-one thousand, five hundred sixty-one".