90748979651 has 18 divisors (see below), whose sum is σ = 100716064956. Its totient is φ = 81092131200.

The previous prime is 90748979617. The next prime is 90748979681. The reversal of 90748979651 is 15697984709.

It is not a de Polignac number, because 90748979651 - 2¹⁴ = 90748963267 is a prime.

It is a super-2 number, since 2×90748979651² (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 (90748979681) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60945515 + ... + 60947003.

It is an arithmetic number, because the mean of its divisors is an integer number (5595336942).

Almost surely, 2^90748979651 is an apocalyptic number.

90748979651 is a deficient number, since it is larger than the sum of its proper divisors (9967085305).

90748979651 is an frugal number, since it uses more digits than its factorization.

90748979651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111 (or 1561 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 65.

The spelling of 90748979651 in words is "ninety billion, seven hundred forty-eight million, nine hundred seventy-nine thousand, six hundred fifty-one".