645679290070 has 32 divisors (see below), whose sum is σ = 1295356600800. Its totient is φ = 230285615616.

The previous prime is 645679290059. The next prime is 645679290073. The reversal of 645679290070 is 70092976546.

It is a junction number, because it is equal to n+sod(n) for n = 645679289993 and 645679290020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645679290073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99947125 + ... + 99953584.

It is an arithmetic number, because the mean of its divisors is an integer number (40479893775).

Almost surely, 2^645679290070 is an apocalyptic number.

645679290070 is an abundant number, since it is smaller than the sum of its proper divisors (649677310730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645679290070 is a wasteful number, since it uses less digits than its factorization.

645679290070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199900752.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 645679290070 in words is "six hundred forty-five billion, six hundred seventy-nine million, two hundred ninety thousand, seventy".