88424169921 has 24 divisors (see below), whose sum is σ = 133293753216. Its totient is φ = 56379343680.

The previous prime is 88424169907. The next prime is 88424169929. The reversal of 88424169921 is 12996142488.

It is a happy number.

88424169921 is a `hidden beast` number, since 88 + 42 + 416 + 99 + 21 = 666.

It is not a de Polignac number, because 88424169921 - 2²⁷ = 88289952193 is a prime.

It is a super-2 number, since 2×88424169921² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (88424169929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1990276 + ... + 2034218.

It is an arithmetic number, because the mean of its divisors is an integer number (5553906384).

Almost surely, 2^88424169921 is an apocalyptic number.

It is an amenable number.

88424169921 is a deficient number, since it is larger than the sum of its proper divisors (44869583295).

88424169921 is a wasteful number, since it uses less digits than its factorization.

88424169921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53693 (or 53690 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 88424169921 in words is "eighty-eight billion, four hundred twenty-four million, one hundred sixty-nine thousand, nine hundred twenty-one".