90909155122 has 8 divisors (see below), whose sum is σ = 136829138796. Its totient is φ = 45299442192.

The previous prime is 90909155101. The next prime is 90909155123. The reversal of 90909155122 is 22155190909.

It can be written as a sum of positive squares in 2 ways, for example, as 66197629521 + 24711525601 = 257289^2 + 157199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (90909155123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77566953 + ... + 77568124.

Almost surely, 2^90909155122 is an apocalyptic number.

90909155122 is a deficient number, since it is larger than the sum of its proper divisors (45919983674).

90909155122 is a wasteful number, since it uses less digits than its factorization.

90909155122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155135372.

The product of its (nonzero) digits is 72900, while the sum is 43.

The spelling of 90909155122 in words is "ninety billion, nine hundred nine million, one hundred fifty-five thousand, one hundred twenty-two".