88121575749 has 16 divisors (see below), whose sum is σ = 124903961280. Its totient is φ = 55104681600.

The previous prime is 88121575723. The next prime is 88121575781. The reversal of 88121575749 is 94757512188.

It is a happy number.

It is not a de Polignac number, because 88121575749 - 2¹⁵ = 88121542981 is a prime.

It is a super-2 number, since 2×88121575749² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88121585749) 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, 7647672 + ... + 7659185.

It is an arithmetic number, because the mean of its divisors is an integer number (7806497580).

Almost surely, 2^88121575749 is an apocalyptic number.

It is an amenable number.

88121575749 is a deficient number, since it is larger than the sum of its proper divisors (36782385531).

88121575749 is a wasteful number, since it uses less digits than its factorization.

88121575749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15306980.

The product of its digits is 5644800, while the sum is 57.

The spelling of 88121575749 in words is "eighty-eight billion, one hundred twenty-one million, five hundred seventy-five thousand, seven hundred forty-nine".