68724046885 has 24 divisors (see below), whose sum is σ = 89586246024. Its totient is φ = 50587729920.

The previous prime is 68724046879. The next prime is 68724046891. The reversal of 68724046885 is 58864042786.

It is an interprime number because it is at equal distance from previous prime (68724046879) and next prime (68724046891).

It can be written as a sum of positive squares in 12 ways, for example, as 67443051204 + 1280995681 = 259698^2 + 35791^2 .

It is not a de Polignac number, because 68724046885 - 2³ = 68724046877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134565 + ... + 394405.

It is an arithmetic number, because the mean of its divisors is an integer number (3732760251).

Almost surely, 2^68724046885 is an apocalyptic number.

68724046885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68724046885 is a deficient number, since it is larger than the sum of its proper divisors (20862199139).

68724046885 is a wasteful number, since it uses less digits than its factorization.

68724046885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260185 (or 260172 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 58.

The spelling of 68724046885 in words is "sixty-eight billion, seven hundred twenty-four million, forty-six thousand, eight hundred eighty-five".