61368255522993 has 128 divisors (see below), whose sum is σ = 88822916775936. Its totient is φ = 37609492838400.

The previous prime is 61368255522991. The next prime is 61368255523009. The reversal of 61368255522993 is 39922555286316.

It is a happy number.

It is not a de Polignac number, because 61368255522993 - 2¹ = 61368255522991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61368255522991) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 43005083746 + ... + 43005085172.

It is an arithmetic number, because the mean of its divisors is an integer number (693929037312).

Almost surely, 2^{61368255522993} is an apocalyptic number.

It is an amenable number.

61368255522993 is a deficient number, since it is larger than the sum of its proper divisors (27454661252943).

61368255522993 is a wasteful number, since it uses less digits than its factorization.

61368255522993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623.

The product of its digits is 209952000, while the sum is 66.

The spelling of 61368255522993 in words is "sixty-one trillion, three hundred sixty-eight billion, two hundred fifty-five million, five hundred twenty-two thousand, nine hundred ninety-three".