2391625641 has 8 divisors (see below), whose sum is σ = 3196410304. Its totient is φ = 1590629040.

The previous prime is 2391625633. The next prime is 2391625693. The reversal of 2391625641 is 1465261932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2391625641 - 2³ = 2391625633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2391625641.

It is not an unprimeable number, because it can be changed into a prime (2391625631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945541 + ... + 948066.

It is an arithmetic number, because the mean of its divisors is an integer number (399551288).

Almost surely, 2^2391625641 is an apocalyptic number.

It is an amenable number.

2391625641 is a deficient number, since it is larger than the sum of its proper divisors (804784663).

2391625641 is a wasteful number, since it uses less digits than its factorization.

2391625641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894031.

The product of its digits is 77760, while the sum is 39.

The square root of 2391625641 is about 48904.2497233114. The cubic root of 2391625641 is about 1337.3068432276.

The spelling of 2391625641 in words is "two billion, three hundred ninety-one million, six hundred twenty-five thousand, six hundred forty-one".