990733545 has 32 divisors (see below), whose sum is σ = 1802275200. Its totient is φ = 516100032.

The previous prime is 990733537. The next prime is 990733561. The reversal of 990733545 is 545337099.

It is not a de Polignac number, because 990733545 - 2³ = 990733537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 990733545.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79530 + ... + 91139.

It is an arithmetic number, because the mean of its divisors is an integer number (56321100).

Almost surely, 2^990733545 is an apocalyptic number.

It is an amenable number.

990733545 is a deficient number, since it is larger than the sum of its proper divisors (811541655).

990733545 is a wasteful number, since it uses less digits than its factorization.

990733545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170726 (or 170720 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 45.

The square root of 990733545 is about 31475.9200818658. The cubic root of 990733545 is about 996.9015914461.

The spelling of 990733545 in words is "nine hundred ninety million, seven hundred thirty-three thousand, five hundred forty-five".