90202988478679 has 16 divisors (see below), whose sum is σ = 92002982071392. Its totient is φ = 88406676753408.

The previous prime is 90202988478649. The next prime is 90202988478709. The reversal of 90202988478679 is 97687488920209.

It is an interprime number because it is at equal distance from previous prime (90202988478649) and next prime (90202988478709).

It is a cyclic number.

It is not a de Polignac number, because 90202988478679 - 2¹¹ = 90202988476631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90202988478599 and 90202988478608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90202988478649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187462452 + ... + 187943014.

It is an arithmetic number, because the mean of its divisors is an integer number (5750186379462).

Almost surely, 2^{90202988478679} is an apocalyptic number.

90202988478679 is a deficient number, since it is larger than the sum of its proper divisors (1799993592713).

90202988478679 is a wasteful number, since it uses less digits than its factorization.

90202988478679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484386.

The product of its (nonzero) digits is 1755758592, while the sum is 79.

The spelling of 90202988478679 in words is "ninety trillion, two hundred two billion, nine hundred eighty-eight million, four hundred seventy-eight thousand, six hundred seventy-nine".