90815195146 has 16 divisors (see below), whose sum is σ = 147686049000. Its totient is φ = 41633396928.

The previous prime is 90815195143. The next prime is 90815195173. The reversal of 90815195146 is 64159151809.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70211750625 + 20603444521 = 264975^2 + 143539^2 .

It is a super-2 number, since 2×90815195146² (a number of 23 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 90815195146.

It is not an unprimeable number, because it can be changed into a prime (90815195143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11717241 + ... + 11724988.

Almost surely, 2^90815195146 is an apocalyptic number.

90815195146 is a deficient number, since it is larger than the sum of its proper divisors (56870853854).

90815195146 is a wasteful number, since it uses less digits than its factorization.

90815195146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23442393.

The product of its (nonzero) digits is 388800, while the sum is 49.

The spelling of 90815195146 in words is "ninety billion, eight hundred fifteen million, one hundred ninety-five thousand, one hundred forty-six".