94721000781 has 16 divisors (see below), whose sum is σ = 138352481280. Its totient is φ = 57166467120.

The previous prime is 94721000747. The next prime is 94721000797. The reversal of 94721000781 is 18700012749.

It is not a de Polignac number, because 94721000781 - 2⁷ = 94721000653 is a prime.

It is a super-2 number, since 2×94721000781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (94721005781) 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, 5996995 + ... + 6012768.

It is an arithmetic number, because the mean of its divisors is an integer number (8647030080).

Almost surely, 2^94721000781 is an apocalyptic number.

It is an amenable number.

94721000781 is a deficient number, since it is larger than the sum of its proper divisors (43631480499).

94721000781 is a wasteful number, since it uses less digits than its factorization.

94721000781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12010016.

The product of its (nonzero) digits is 28224, while the sum is 39.

The spelling of 94721000781 in words is "ninety-four billion, seven hundred twenty-one million, seven hundred eighty-one", and thus it is an aban number.