8897400561 has 16 divisors (see below), whose sum is σ = 13611967488. Its totient is φ = 5063970000.

The previous prime is 8897400539. The next prime is 8897400583. The reversal of 8897400561 is 1650047988.

It is an interprime number because it is at equal distance from previous prime (8897400539) and next prime (8897400583).

It is not a de Polignac number, because 8897400561 - 2⁶ = 8897400497 is a prime.

It is a super-2 number, since 2×8897400561² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8897400561.

It is not an unprimeable number, because it can be changed into a prime (8897400521) 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, 838725 + ... + 849266.

It is an arithmetic number, because the mean of its divisors is an integer number (850747968).

Almost surely, 2^8897400561 is an apocalyptic number.

It is an amenable number.

8897400561 is a deficient number, since it is larger than the sum of its proper divisors (4714566927).

8897400561 is a wasteful number, since it uses less digits than its factorization.

8897400561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688252.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 8897400561 is about 94326.0333153048. The cubic root of 8897400561 is about 2072.1493199765.

The spelling of 8897400561 in words is "eight billion, eight hundred ninety-seven million, four hundred thousand, five hundred sixty-one".