2506626643 has 8 divisors (see below), whose sum is σ = 2561465088. Its totient is φ = 2452374984.

The previous prime is 2506626631. The next prime is 2506626691. The reversal of 2506626643 is 3466266052.

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

It is a cyclic number.

It is not a de Polignac number, because 2506626643 - 2⁹ = 2506626131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2506626596 and 2506626605.

It is not an unprimeable number, because it can be changed into a prime (2506626743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138055 + ... + 155152.

It is an arithmetic number, because the mean of its divisors is an integer number (320183136).

Almost surely, 2^2506626643 is an apocalyptic number.

2506626643 is a deficient number, since it is larger than the sum of its proper divisors (54838445).

2506626643 is a wasteful number, since it uses less digits than its factorization.

2506626643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293393.

The product of its (nonzero) digits is 311040, while the sum is 40.

The square root of 2506626643 is about 50066.2225757047. Note that the first 3 decimals coincide. The cubic root of 2506626643 is about 1358.4069154296.

The spelling of 2506626643 in words is "two billion, five hundred six million, six hundred twenty-six thousand, six hundred forty-three".