690580845 has 48 divisors (see below), whose sum is σ = 1211625792. Its totient is φ = 363847680.

The previous prime is 690580841. The next prime is 690580871. The reversal of 690580845 is 548085096.

690580845 is a `hidden beast` number, since 69 + 0 + 580 + 8 + 4 + 5 = 666.

It is not a de Polignac number, because 690580845 - 2² = 690580841 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 690580845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690580841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2440074 + ... + 2440356.

It is an arithmetic number, because the mean of its divisors is an integer number (25242204).

Almost surely, 2^690580845 is an apocalyptic number.

It is an amenable number.

690580845 is a deficient number, since it is larger than the sum of its proper divisors (521044947).

690580845 is a wasteful number, since it uses less digits than its factorization.

690580845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 690580845 is about 26278.9049429385. The cubic root of 690580845 is about 883.9034777362.

The spelling of 690580845 in words is "six hundred ninety million, five hundred eighty thousand, eight hundred forty-five".