90025039990 has 8 divisors (see below), whose sum is σ = 162045072000. Its totient is φ = 36010015992.

The previous prime is 90025039961. The next prime is 90025040009. The reversal of 90025039990 is 9993052009.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90025039990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4501251990 + ... + 4501252009.

It is an arithmetic number, because the mean of its divisors is an integer number (20255634000).

Almost surely, 2^90025039990 is an apocalyptic number.

90025039990 is a deficient number, since it is larger than the sum of its proper divisors (72020032010).

90025039990 is a wasteful number, since it uses less digits than its factorization.

90025039990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9002504006.

The product of its (nonzero) digits is 196830, while the sum is 46.

The spelling of 90025039990 in words is "ninety billion, twenty-five million, thirty-nine thousand, nine hundred ninety".