90581825949 has 4 divisors (see below), whose sum is σ = 120775767936. Its totient is φ = 60387883964.

The previous prime is 90581825903. The next prime is 90581825969. The reversal of 90581825949 is 94952818509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90581825949 - 2⁸ = 90581825693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90581825892 and 90581825901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90581825969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15096970989 + ... + 15096970994.

It is an arithmetic number, because the mean of its divisors is an integer number (30193941984).

Almost surely, 2^90581825949 is an apocalyptic number.

It is an amenable number.

90581825949 is a deficient number, since it is larger than the sum of its proper divisors (30193941987).

90581825949 is a wasteful number, since it uses less digits than its factorization.

90581825949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30193941986.

The product of its (nonzero) digits is 9331200, while the sum is 60.

The spelling of 90581825949 in words is "ninety billion, five hundred eighty-one million, eight hundred twenty-five thousand, nine hundred forty-nine".