90515474693 has 4 divisors (see below), whose sum is σ = 103446256800. Its totient is φ = 77584692588.

The previous prime is 90515474663. The next prime is 90515474717. The reversal of 90515474693 is 39647451509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39647451509 = 13597 ⋅2915897.

It is a cyclic number.

It is not a de Polignac number, because 90515474693 - 2⁶ = 90515474629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90515474663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6465391043 + ... + 6465391056.

It is an arithmetic number, because the mean of its divisors is an integer number (25861564200).

Almost surely, 2^90515474693 is an apocalyptic number.

It is an amenable number.

90515474693 is a deficient number, since it is larger than the sum of its proper divisors (12930782107).

90515474693 is a wasteful number, since it uses less digits than its factorization.

90515474693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12930782106.

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 90515474693 in words is "ninety billion, five hundred fifteen million, four hundred seventy-four thousand, six hundred ninety-three".