2912421645 has 48 divisors (see below), whose sum is σ = 5773173120. Its totient is φ = 1330515072.

The previous prime is 2912421641. The next prime is 2912421647. The reversal of 2912421645 is 5461242192.

It is a happy number.

2912421645 is a `hidden beast` number, since 2 + 9 + 1 + 2 + 4 + 2 + 1 + 645 = 666.

It is not a de Polignac number, because 2912421645 - 2² = 2912421641 is a prime.

It is a super-3 number, since 3×2912421645³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2912421641) 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, 892026 + ... + 895284.

It is an arithmetic number, because the mean of its divisors is an integer number (120274440).

Almost surely, 2^2912421645 is an apocalyptic number.

It is an amenable number.

2912421645 is a deficient number, since it is larger than the sum of its proper divisors (2860751475).

2912421645 is a wasteful number, since it uses less digits than its factorization.

2912421645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114 (or 6111 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 2912421645 is about 53966.8569123680. The cubic root of 2912421645 is about 1428.0763161554.

The spelling of 2912421645 in words is "two billion, nine hundred twelve million, four hundred twenty-one thousand, six hundred forty-five".