68491011 has 16 divisors (see below), whose sum is σ = 100029600. Its totient is φ = 41491968.

The previous prime is 68490971. The next prime is 68491013. The reversal of 68491011 is 11019486.

It is not a de Polignac number, because 68491011 - 2²⁵ = 34936579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68491011.

It is not an unprimeable number, because it can be changed into a prime (68491013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21676 + ... + 24633.

It is an arithmetic number, because the mean of its divisors is an integer number (6251850).

Almost surely, 2^68491011 is an apocalyptic number.

68491011 is a deficient number, since it is larger than the sum of its proper divisors (31538589).

68491011 is a wasteful number, since it uses less digits than its factorization.

68491011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46358.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 68491011 is about 8275.9296154571. The cubic root of 68491011 is about 409.1455753973.

The spelling of 68491011 in words is "sixty-eight million, four hundred ninety-one thousand, eleven".