90625647461 has 4 divisors (see below), whose sum is σ = 95395418400. Its totient is φ = 85855876524.

The previous prime is 90625647449. The next prime is 90625647491. The reversal of 90625647461 is 16474652609.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16474652609 = 100237 ⋅164357.

It is a cyclic number.

It is not a de Polignac number, because 90625647461 - 2¹⁴ = 90625631077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90625647491) 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 3 ways as a sum of consecutive naturals, for example, 2384885441 + ... + 2384885478.

It is an arithmetic number, because the mean of its divisors is an integer number (23848854600).

Almost surely, 2^90625647461 is an apocalyptic number.

It is an amenable number.

90625647461 is a deficient number, since it is larger than the sum of its proper divisors (4769770939).

90625647461 is a wasteful number, since it uses less digits than its factorization.

90625647461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769770938.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 90625647461 in words is "ninety billion, six hundred twenty-five million, six hundred forty-seven thousand, four hundred sixty-one".