68901655 has 4 divisors (see below), whose sum is σ = 82681992. Its totient is φ = 55121320.

The previous prime is 68901653. The next prime is 68901713. The reversal of 68901655 is 55610986.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68901655 - 2¹ = 68901653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68901653) 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, 6890161 + ... + 6890170.

It is an arithmetic number, because the mean of its divisors is an integer number (20670498).

Almost surely, 2^68901655 is an apocalyptic number.

68901655 is a deficient number, since it is larger than the sum of its proper divisors (13780337).

68901655 is a wasteful number, since it uses less digits than its factorization.

68901655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13780336.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 68901655 is about 8300.7020787401. The cubic root of 68901655 is about 409.9616363073.

The spelling of 68901655 in words is "sixty-eight million, nine hundred one thousand, six hundred fifty-five".