90256473838 has 4 divisors (see below), whose sum is σ = 135384710760. Its totient is φ = 45128236918.

The previous prime is 90256473823. The next prime is 90256473847. The reversal of 90256473838 is 83837465209.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22564118458 + ... + 22564118461.

It is an arithmetic number, because the mean of its divisors is an integer number (33846177690).

Almost surely, 2^90256473838 is an apocalyptic number.

90256473838 is a deficient number, since it is larger than the sum of its proper divisors (45128236922).

90256473838 is a wasteful number, since it uses less digits than its factorization.

90256473838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45128236921.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 90256473838 in words is "ninety billion, two hundred fifty-six million, four hundred seventy-three thousand, eight hundred thirty-eight".