68629520624491 has 4 divisors (see below), whose sum is σ = 68640937952184. Its totient is φ = 68618103296800.

The previous prime is 68629520624461. The next prime is 68629520624573. The reversal of 68629520624491 is 19442602592686.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68629520624491 - 2⁵ = 68629520624459 is a prime.

It is a super-3 number, since 3×68629520624491³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68629520624461) 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, 5708654830 + ... + 5708666851.

It is an arithmetic number, because the mean of its divisors is an integer number (17160234488046).

Almost surely, 2^{68629520624491} is an apocalyptic number.

68629520624491 is a deficient number, since it is larger than the sum of its proper divisors (11417327693).

68629520624491 is a wasteful number, since it uses less digits than its factorization.

68629520624491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11417327692.

The product of its (nonzero) digits is 89579520, while the sum is 64.

The spelling of 68629520624491 in words is "sixty-eight trillion, six hundred twenty-nine billion, five hundred twenty million, six hundred twenty-four thousand, four hundred ninety-one".