90905220951 has 8 divisors (see below), whose sum is σ = 124163228784. Its totient is φ = 59125346880.

The previous prime is 90905220949. The next prime is 90905221007. The reversal of 90905220951 is 15902250909.

It is a happy number.

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

It is not a de Polignac number, because 90905220951 - 2¹ = 90905220949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90905220251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369533296 + ... + 369533541.

It is an arithmetic number, because the mean of its divisors is an integer number (15520403598).

Almost surely, 2^90905220951 is an apocalyptic number.

90905220951 is a deficient number, since it is larger than the sum of its proper divisors (33258007833).

90905220951 is a wasteful number, since it uses less digits than its factorization.

90905220951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739066881.

The product of its (nonzero) digits is 72900, while the sum is 42.

The spelling of 90905220951 in words is "ninety billion, nine hundred five million, two hundred twenty thousand, nine hundred fifty-one".