8721961470 has 64 divisors (see below), whose sum is σ = 23280445440. Its totient is φ = 2323668384.

The previous prime is 8721961441. The next prime is 8721961471. The reversal of 8721961470 is 741691278.

It is a happy number.

8721961470 is a `hidden beast` number, since 8 + 7 + 21 + 9 + 614 + 7 + 0 = 666.

It is a super-2 number, since 2×8721961470² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721961471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283167 + ... + 312453.

It is an arithmetic number, because the mean of its divisors is an integer number (363756960).

Almost surely, 2^8721961470 is an apocalyptic number.

8721961470 is an abundant number, since it is smaller than the sum of its proper divisors (14558483970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8721961470 is a wasteful number, since it uses less digits than its factorization.

8721961470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30406 (or 30400 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 8721961470 is about 93391.4421668281. The cubic root of 8721961470 is about 2058.4392512421.

The spelling of 8721961470 in words is "eight billion, seven hundred twenty-one million, nine hundred sixty-one thousand, four hundred seventy".