90461131281 has 6 divisors (see below), whose sum is σ = 130666078530. Its totient is φ = 60307420848.

The previous prime is 90461131273. The next prime is 90461131283. The reversal of 90461131281 is 18213116409.

90461131281 is a `hidden beast` number, since 9 + 0 + 4 + 611 + 31 + 2 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75891434256 + 14569697025 = 275484^2 + 120705^2 .

It is not a de Polignac number, because 90461131281 - 2³ = 90461131273 is a prime.

It is a super-2 number, since 2×90461131281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90461131283) 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, 5025618396 + ... + 5025618413.

It is an arithmetic number, because the mean of its divisors is an integer number (21777679755).

Almost surely, 2^90461131281 is an apocalyptic number.

It is an amenable number.

90461131281 is a deficient number, since it is larger than the sum of its proper divisors (40204947249).

90461131281 is a wasteful number, since it uses less digits than its factorization.

90461131281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051236815 (or 10051236812 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 90461131281 in words is "ninety billion, four hundred sixty-one million, one hundred thirty-one thousand, two hundred eighty-one".