90842987277 has 24 divisors (see below), whose sum is σ = 156483160704. Its totient is φ = 49653309024.

The previous prime is 90842987251. The next prime is 90842987293. The reversal of 90842987277 is 77278924809.

It is not a de Polignac number, because 90842987277 - 2⁸ = 90842987021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90842983277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31345338 + ... + 31348235.

It is an arithmetic number, because the mean of its divisors is an integer number (6520131696).

Almost surely, 2^90842987277 is an apocalyptic number.

It is an amenable number.

90842987277 is a deficient number, since it is larger than the sum of its proper divisors (65640173427).

90842987277 is a wasteful number, since it uses less digits than its factorization.

90842987277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62693609 (or 62693606 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

It can be divided in two parts, 9084 and 2987277, that added together give a square (2996361 = 1731²).

The spelling of 90842987277 in words is "ninety billion, eight hundred forty-two million, nine hundred eighty-seven thousand, two hundred seventy-seven".