90908511206 has 4 divisors (see below), whose sum is σ = 136362766812. Its totient is φ = 45454255602.

The previous prime is 90908511097. The next prime is 90908511227. The reversal of 90908511206 is 60211580909.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22727127800 + ... + 22727127803.

It is an arithmetic number, because the mean of its divisors is an integer number (34090691703).

Almost surely, 2^90908511206 is an apocalyptic number.

90908511206 is a deficient number, since it is larger than the sum of its proper divisors (45454255606).

90908511206 is a wasteful number, since it uses less digits than its factorization.

90908511206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45454255605.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 90908511206 in words is "ninety billion, nine hundred eight million, five hundred eleven thousand, two hundred six".