68461655 has 16 divisors (see below), whose sum is σ = 88819680. Its totient is φ = 50481792.

The previous prime is 68461651. The next prime is 68461661. The reversal of 68461655 is 55616486.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68461655 - 2² = 68461651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68461651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6224 + ... + 13253.

It is an arithmetic number, because the mean of its divisors is an integer number (5551230).

Almost surely, 2^68461655 is an apocalyptic number.

68461655 is a deficient number, since it is larger than the sum of its proper divisors (20358025).

68461655 is a wasteful number, since it uses less digits than its factorization.

68461655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19538.

The product of its digits is 172800, while the sum is 41.

The square root of 68461655 is about 8274.1558481817. The cubic root of 68461655 is about 409.0871122805.

The spelling of 68461655 in words is "sixty-eight million, four hundred sixty-one thousand, six hundred fifty-five".