90194952328157 has 4 divisors (see below), whose sum is σ = 90201229393980. Its totient is φ = 90188675262336.

The previous prime is 90194952328153. The next prime is 90194952328181. The reversal of 90194952328157 is 75182325949109.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20945825908921 + 69249126419236 = 4576661^2 + 8321606^2 .

It is a cyclic number.

It is not a de Polignac number, because 90194952328157 - 2² = 90194952328153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90194952328093 and 90194952328102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90194952328153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3138511358 + ... + 3138540095.

It is an arithmetic number, because the mean of its divisors is an integer number (22550307348495).

Almost surely, 2^{90194952328157} is an apocalyptic number.

It is an amenable number.

90194952328157 is a deficient number, since it is larger than the sum of its proper divisors (6277065823).

90194952328157 is a wasteful number, since it uses less digits than its factorization.

90194952328157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6277065822.

The product of its (nonzero) digits is 48988800, while the sum is 65.

The spelling of 90194952328157 in words is "ninety trillion, one hundred ninety-four billion, nine hundred fifty-two million, three hundred twenty-eight thousand, one hundred fifty-seven".