88090533981 has 6 divisors (see below), whose sum is σ = 127241882430. Its totient is φ = 58727022648.

The previous prime is 88090533961. The next prime is 88090533997. The reversal of 88090533981 is 18933509088.

It can be written as a sum of positive squares in only one way, i.e., 72592524900 + 15498009081 = 269430^2 + 124491^2 .

It is not a de Polignac number, because 88090533981 - 2²¹ = 88088436829 is a prime.

It is a super-2 number, since 2×88090533981² (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 (88090533961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4893918546 + ... + 4893918563.

It is an arithmetic number, because the mean of its divisors is an integer number (21206980405).

Almost surely, 2^88090533981 is an apocalyptic number.

It is an amenable number.

88090533981 is a deficient number, since it is larger than the sum of its proper divisors (39151348449).

88090533981 is a wasteful number, since it uses less digits than its factorization.

88090533981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9787837115 (or 9787837112 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 88090533981 in words is "eighty-eight billion, ninety million, five hundred thirty-three thousand, nine hundred eighty-one".