90983697550 has 24 divisors (see below), whose sum is σ = 169438420872. Its totient is φ = 36348588000.

The previous prime is 90983697523. The next prime is 90983697557. The reversal of 90983697550 is 5579638909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90983697557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1081321 + ... + 1162420.

It is an arithmetic number, because the mean of its divisors is an integer number (7059934203).

Almost surely, 2^90983697550 is an apocalyptic number.

90983697550 is a deficient number, since it is larger than the sum of its proper divisors (78454723322).

90983697550 is a wasteful number, since it uses less digits than its factorization.

90983697550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244564 (or 2244559 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 61.

The spelling of 90983697550 in words is "ninety billion, nine hundred eighty-three million, six hundred ninety-seven thousand, five hundred fifty".