68406253852 has 6 divisors (see below), whose sum is σ = 119710944248. Its totient is φ = 34203126924.

The previous prime is 68406253841. The next prime is 68406253921. The reversal of 68406253852 is 25835260486.

It is a junction number, because it is equal to n+sod(n) for n = 68406253796 and 68406253805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8550781728 + ... + 8550781735.

Almost surely, 2^68406253852 is an apocalyptic number.

It is an amenable number.

68406253852 is a deficient number, since it is larger than the sum of its proper divisors (51304690396).

68406253852 is a wasteful number, since it uses less digits than its factorization.

68406253852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17101563467 (or 17101563465 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 68406253852 in words is "sixty-eight billion, four hundred six million, two hundred fifty-three thousand, eight hundred fifty-two".