68157944 has 8 divisors (see below), whose sum is σ = 127796160. Its totient is φ = 34078968.

The previous prime is 68157937. The next prime is 68157977. The reversal of 68157944 is 44975186.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 68157895 and 68157904.

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, 4259864 + ... + 4259879.

It is an arithmetic number, because the mean of its divisors is an integer number (15974520).

Almost surely, 2^68157944 is an apocalyptic number.

It is an amenable number.

68157944 is a deficient number, since it is larger than the sum of its proper divisors (59638216).

68157944 is a wasteful number, since it uses less digits than its factorization.

68157944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8519749 (or 8519745 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 68157944 is about 8255.7824583743. The cubic root of 68157944 is about 408.4812819799.

The spelling of 68157944 in words is "sixty-eight million, one hundred fifty-seven thousand, nine hundred forty-four".