68307148657 has 4 divisors (see below), whose sum is σ = 74516889456. Its totient is φ = 62097407860.

The previous prime is 68307148649. The next prime is 68307148727. The reversal of 68307148657 is 75684170386.

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 68307148657 - 2³ = 68307148649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68307148598 and 68307148607.

It is not an unprimeable number, because it can be changed into a prime (68307148607) 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, 3104870383 + ... + 3104870404.

It is an arithmetic number, because the mean of its divisors is an integer number (18629222364).

Almost surely, 2^68307148657 is an apocalyptic number.

It is an amenable number.

68307148657 is a deficient number, since it is larger than the sum of its proper divisors (6209740799).

68307148657 is a wasteful number, since it uses less digits than its factorization.

68307148657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209740798.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 68307148657 in words is "sixty-eight billion, three hundred seven million, one hundred forty-eight thousand, six hundred fifty-seven".