68621565 has 8 divisors (see below), whose sum is σ = 109794528. Its totient is φ = 36598160.

The previous prime is 68621563. The next prime is 68621621. The reversal of 68621565 is 56512686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68621565 - 2¹ = 68621563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68621563) 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, 2287371 + ... + 2287400.

It is an arithmetic number, because the mean of its divisors is an integer number (13724316).

Almost surely, 2^68621565 is an apocalyptic number.

It is an amenable number.

68621565 is a deficient number, since it is larger than the sum of its proper divisors (41172963).

68621565 is a wasteful number, since it uses less digits than its factorization.

68621565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574779.

The product of its digits is 86400, while the sum is 39.

The square root of 68621565 is about 8283.8134334375. The cubic root of 68621565 is about 409.4053743949.

The spelling of 68621565 in words is "sixty-eight million, six hundred twenty-one thousand, five hundred sixty-five".