90511615 has 8 divisors (see below), whose sum is σ = 109129968. Its totient is φ = 72065280.

The previous prime is 90511609. The next prime is 90511667. The reversal of 90511615 is 51611509.

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

It is not a de Polignac number, because 90511615 - 2¹⁵ = 90478847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41842 + ... + 43951.

It is an arithmetic number, because the mean of its divisors is an integer number (13641246).

Almost surely, 2^90511615 is an apocalyptic number.

90511615 is a deficient number, since it is larger than the sum of its proper divisors (18618353).

90511615 is a wasteful number, since it uses less digits than its factorization.

90511615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86009.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 90511615 is about 9513.7592464809. The cubic root of 90511615 is about 448.9880387619.

The spelling of 90511615 in words is "ninety million, five hundred eleven thousand, six hundred fifteen".