68124397553 has 4 divisors (see below), whose sum is σ = 70473514740. Its totient is φ = 65775280368.

The previous prime is 68124397519. The next prime is 68124397573. The reversal of 68124397553 is 35579342186.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13038899344 + 55085498209 = 114188^2 + 234703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68124397553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68124397495 and 68124397504.

It is not an unprimeable number, because it can be changed into a prime (68124397513) 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, 1174558550 + ... + 1174558607.

It is an arithmetic number, because the mean of its divisors is an integer number (17618378685).

Almost surely, 2^68124397553 is an apocalyptic number.

It is an amenable number.

68124397553 is a deficient number, since it is larger than the sum of its proper divisors (2349117187).

68124397553 is a wasteful number, since it uses less digits than its factorization.

68124397553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349117186.

The product of its digits is 5443200, while the sum is 53.

The spelling of 68124397553 in words is "sixty-eight billion, one hundred twenty-four million, three hundred ninety-seven thousand, five hundred fifty-three".