90661575419 has 4 divisors (see below), whose sum is σ = 93586142400. Its totient is φ = 87737008440.

The previous prime is 90661575391. The next prime is 90661575463. The reversal of 90661575419 is 91457516609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91457516609 = 90863 ⋅1006543.

It is a cyclic number.

It is not a de Polignac number, because 90661575419 - 2³² = 86366608123 is a prime.

It is a super-2 number, since 2×90661575419² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90661575469) 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, 1462283444 + ... + 1462283505.

It is an arithmetic number, because the mean of its divisors is an integer number (23396535600).

Almost surely, 2^90661575419 is an apocalyptic number.

90661575419 is a deficient number, since it is larger than the sum of its proper divisors (2924566981).

90661575419 is a wasteful number, since it uses less digits than its factorization.

90661575419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924566980.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The spelling of 90661575419 in words is "ninety billion, six hundred sixty-one million, five hundred seventy-five thousand, four hundred nineteen".