90711842402 has 4 divisors (see below), whose sum is σ = 136067763606. Its totient is φ = 45355921200.

The previous prime is 90711842399. The next prime is 90711842407. The reversal of 90711842402 is 20424811709.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 84489630241 + 6222212161 = 290671^2 + 78881^2 .

It is not an unprimeable number, because it can be changed into a prime (90711842407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22677960599 + ... + 22677960602.

Almost surely, 2^90711842402 is an apocalyptic number.

90711842402 is a deficient number, since it is larger than the sum of its proper divisors (45355921204).

90711842402 is a wasteful number, since it uses less digits than its factorization.

90711842402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45355921203.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 90711842402 in words is "ninety billion, seven hundred eleven million, eight hundred forty-two thousand, four hundred two".