68735251690 has 32 divisors (see below), whose sum is σ = 141412003200. Its totient is φ = 23564076864.

The previous prime is 68735251667. The next prime is 68735251709. The reversal of 68735251690 is 9615253786.

It is a super-2 number, since 2×68735251690² (a number of 22 digits) contains 22 as substring.

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, 776964 + ... + 860896.

It is an arithmetic number, because the mean of its divisors is an integer number (4419125100).

Almost surely, 2^68735251690 is an apocalyptic number.

68735251690 is an abundant number, since it is smaller than the sum of its proper divisors (72676751510).

68735251690 is a wasteful number, since it uses less digits than its factorization.

68735251690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95646.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 68735251690 in words is "sixty-eight billion, seven hundred thirty-five million, two hundred fifty-one thousand, six hundred ninety".