2640640106623 has 8 divisors (see below), whose sum is σ = 2651158984896. Its totient is φ = 2630140800000.

The previous prime is 2640640106603. The next prime is 2640640106633. The reversal of 2640640106623 is 3266010460462.

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 2640640106623 - 2¹⁷ = 2640639975551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640640106603) 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, 4622503 + ... + 5162248.

It is an arithmetic number, because the mean of its divisors is an integer number (331394873112).

Almost surely, 2^{2640640106623} is an apocalyptic number.

2640640106623 is a deficient number, since it is larger than the sum of its proper divisors (10518878273).

2640640106623 is an equidigital number, since it uses as much as digits as its factorization.

2640640106623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9785825.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 2640640106623 in words is "two trillion, six hundred forty billion, six hundred forty million, one hundred six thousand, six hundred twenty-three".