68621956 has 24 divisors (see below), whose sum is σ = 131523840. Its totient is φ = 31133472.

The previous prime is 68621953. The next prime is 68621963. The reversal of 68621956 is 65912686.

It is not an unprimeable number, because it can be changed into a prime (68621951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8116 + ... + 14251.

It is an arithmetic number, because the mean of its divisors is an integer number (5480160).

Almost surely, 2^68621956 is an apocalyptic number.

It is an amenable number.

68621956 is a deficient number, since it is larger than the sum of its proper divisors (62901884).

68621956 is a wasteful number, since it uses less digits than its factorization.

68621956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22443 (or 22441 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 68621956 is about 8283.8370336457. The cubic root of 68621956 is about 409.4061519794.

It can be divided in two parts, 686 and 21956, that multiplied together give a triangular number (15061816 = T₅₄₈₈).

The spelling of 68621956 in words is "sixty-eight million, six hundred twenty-one thousand, nine hundred fifty-six".