90149555 has 16 divisors (see below), whose sum is σ = 116709984. Its totient is φ = 66593280.

The previous prime is 90149551. The next prime is 90149561. The reversal of 90149555 is 55594109.

It is not a de Polignac number, because 90149555 - 2² = 90149551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90149551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5501 + ... + 14510.

It is an arithmetic number, because the mean of its divisors is an integer number (7294374).

Almost surely, 2^90149555 is an apocalyptic number.

90149555 is a deficient number, since it is larger than the sum of its proper divisors (26560429).

90149555 is a wasteful number, since it uses less digits than its factorization.

90149555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20086.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 90149555 is about 9494.7119492905. The cubic root of 90149555 is about 448.3885656155.

The spelling of 90149555 in words is "ninety million, one hundred forty-nine thousand, five hundred fifty-five".