90155338561 has 8 divisors (see below), whose sum is σ = 94903366400. Its totient is φ = 85407611760.

The previous prime is 90155338549. The next prime is 90155338573. The reversal of 90155338561 is 16583355109.

It is an interprime number because it is at equal distance from previous prime (90155338549) and next prime (90155338573).

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 90155338561 - 2²⁹ = 89618467649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90155308561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801451 + ... + 906991.

It is an arithmetic number, because the mean of its divisors is an integer number (11862920800).

Almost surely, 2^90155338561 is an apocalyptic number.

It is an amenable number.

90155338561 is a deficient number, since it is larger than the sum of its proper divisors (4748027839).

90155338561 is a wasteful number, since it uses less digits than its factorization.

90155338561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150519.

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 90155338561 in words is "ninety billion, one hundred fifty-five million, three hundred thirty-eight thousand, five hundred sixty-one".