90863776649 has 16 divisors (see below), whose sum is σ = 94075645440. Its totient is φ = 87712536960.

The previous prime is 90863776543. The next prime is 90863776711. The reversal of 90863776649 is 94667736809.

It is a cyclic number.

It is not a de Polignac number, because 90863776649 - 2¹² = 90863772553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90463776649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2163797 + ... + 2205389.

It is an arithmetic number, because the mean of its divisors is an integer number (5879727840).

Almost surely, 2^90863776649 is an apocalyptic number.

It is an amenable number.

90863776649 is a deficient number, since it is larger than the sum of its proper divisors (3211868791).

90863776649 is a wasteful number, since it uses less digits than its factorization.

90863776649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42320.

The product of its (nonzero) digits is 82301184, while the sum is 65.

The spelling of 90863776649 in words is "ninety billion, eight hundred sixty-three million, seven hundred seventy-six thousand, six hundred forty-nine".