68610551 has 2 divisors, whose sum is σ = 68610552. Its totient is φ = 68610550.

The previous prime is 68610547. The next prime is 68610557. The reversal of 68610551 is 15501686.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68610551 - 2² = 68610547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68610557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34305275 + 34305276.

It is an arithmetic number, because the mean of its divisors is an integer number (34305276).

Almost surely, 2^68610551 is an apocalyptic number.

68610551 is a deficient number, since it is larger than the sum of its proper divisors (1).

68610551 is an equidigital number, since it uses as much as digits as its factorization.

68610551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 68610551 is about 8283.1486163173. The cubic root of 68610551 is about 409.3834695604.

The spelling of 68610551 in words is "sixty-eight million, six hundred ten thousand, five hundred fifty-one".