61651743618265 has 16 divisors (see below), whose sum is σ = 74518120879488. Its totient is φ = 48965092033536.

The previous prime is 61651743618211. The next prime is 61651743618281. The reversal of 61651743618265 is 56281634715616.

It is a cyclic number.

It is not a de Polignac number, because 61651743618265 - 2²¹ = 61651741521113 is a prime.

It is a super-2 number, since 2×61651743618265² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65123287 + ... + 66063196.

It is an arithmetic number, because the mean of its divisors is an integer number (4657382554968).

Almost surely, 2^{61651743618265} is an apocalyptic number.

It is an amenable number.

61651743618265 is a deficient number, since it is larger than the sum of its proper divisors (12866377261223).

61651743618265 is a wasteful number, since it uses less digits than its factorization.

61651743618265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131187168.

The product of its digits is 43545600, while the sum is 61.

The spelling of 61651743618265 in words is "sixty-one trillion, six hundred fifty-one billion, seven hundred forty-three million, six hundred eighteen thousand, two hundred sixty-five".