90011645 has 16 divisors (see below), whose sum is σ = 114480000. Its totient is φ = 67750848.

The previous prime is 90011609. The next prime is 90011659. The reversal of 90011645 is 54611009.

It is a cyclic number.

It is not a de Polignac number, because 90011645 - 2²² = 85817341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10976 + ... + 17334.

It is an arithmetic number, because the mean of its divisors is an integer number (7155000).

Almost surely, 2^90011645 is an apocalyptic number.

90011645 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90011645 is a deficient number, since it is larger than the sum of its proper divisors (24468355).

90011645 is a wasteful number, since it uses less digits than its factorization.

90011645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 90011645 is about 9487.4467060427. The cubic root of 90011645 is about 448.1598019549.

The spelling of 90011645 in words is "ninety million, eleven thousand, six hundred forty-five".