61368255526309 has 4 divisors (see below), whose sum is σ = 64036440549216. Its totient is φ = 58700070503404.

The previous prime is 61368255526183. The next prime is 61368255526349. The reversal of 61368255526309 is 90362555286316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61368255526309 - 2¹³ = 61368255518117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61368255526349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334092511419 + ... + 1334092511464.

It is an arithmetic number, because the mean of its divisors is an integer number (16009110137304).

Almost surely, 2^{61368255526309} is an apocalyptic number.

It is an amenable number.

61368255526309 is a deficient number, since it is larger than the sum of its proper divisors (2668185022907).

61368255526309 is a wasteful number, since it uses less digits than its factorization.

61368255526309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668185022906.

The product of its (nonzero) digits is 69984000, while the sum is 61.

The spelling of 61368255526309 in words is "sixty-one trillion, three hundred sixty-eight billion, two hundred fifty-five million, five hundred twenty-six thousand, three hundred nine".