1870266645 has 64 divisors (see below), whose sum is σ = 3791370240. Its totient is φ = 866571264.

The previous prime is 1870266641. The next prime is 1870266647. The reversal of 1870266645 is 5466620781.

It is not a de Polignac number, because 1870266645 - 2² = 1870266641 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 1870266645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1870266641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1509 + ... + 61178.

It is an arithmetic number, because the mean of its divisors is an integer number (59240160).

Almost surely, 2^1870266645 is an apocalyptic number.

1870266645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1870266645 is an abundant number, since it is smaller than the sum of its proper divisors (1921103595).

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

1870266645 is a wasteful number, since it uses less digits than its factorization.

1870266645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62731 (or 62725 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 1870266645 is about 43246.5795757306. The cubic root of 1870266645 is about 1232.0675221345.

The spelling of 1870266645 in words is "one billion, eight hundred seventy million, two hundred sixty-six thousand, six hundred forty-five".