90420065045 has 8 divisors (see below), whose sum is σ = 108627243480. Its totient is φ = 72253941760.

The previous prime is 90420065009. The next prime is 90420065051. The reversal of 90420065045 is 54056002409.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3254588401 + 87165476644 = 57049^2 + 295238^2 .

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

It is not a de Polignac number, because 90420065045 - 2⁶ = 90420064981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90420064996 and 90420065014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10258940 + ... + 10267749.

It is an arithmetic number, because the mean of its divisors is an integer number (13578405435).

Almost surely, 2^90420065045 is an apocalyptic number.

It is an amenable number.

90420065045 is a deficient number, since it is larger than the sum of its proper divisors (18207178435).

90420065045 is a wasteful number, since it uses less digits than its factorization.

90420065045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20527575.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 90420065045 in words is "ninety billion, four hundred twenty million, sixty-five thousand, forty-five".