2145620764 has 12 divisors (see below), whose sum is σ = 4291241584. Its totient is φ = 919551744.

The previous prime is 2145620753. The next prime is 2145620773. The reversal of 2145620764 is 4670265412.

2145620764 is an admirable number.

It is a super-3 number, since 3×2145620764³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38314629 + ... + 38314684.

Almost surely, 2^2145620764 is an apocalyptic number.

It is an amenable number.

2145620764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2145620764 is a wasteful number, since it uses less digits than its factorization.

2145620764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76629324 (or 76629322 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 2145620764 is about 46320.8458903764. The cubic root of 2145620764 is about 1289.7859877730.

The spelling of 2145620764 in words is "two billion, one hundred forty-five million, six hundred twenty thousand, seven hundred sixty-four".