90649603561 has 8 divisors (see below), whose sum is σ = 98942193504. Its totient is φ = 82365633120.

The previous prime is 90649603547. The next prime is 90649603567. The reversal of 90649603561 is 16530694609.

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

It is a cyclic number.

It is not a de Polignac number, because 90649603561 - 2²¹ = 90647506409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90649603567) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2132871 + ... + 2174956.

It is an arithmetic number, because the mean of its divisors is an integer number (12367774188).

Almost surely, 2^90649603561 is an apocalyptic number.

It is an amenable number.

90649603561 is a deficient number, since it is larger than the sum of its proper divisors (8292589943).

90649603561 is a wasteful number, since it uses less digits than its factorization.

90649603561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309751.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 90649603561 in words is "ninety billion, six hundred forty-nine million, six hundred three thousand, five hundred sixty-one".