2645015009791 has 24 divisors (see below), whose sum is σ = 3554013414096. Its totient is φ = 1939812376320.

The previous prime is 2645015009771. The next prime is 2645015009837. The reversal of 2645015009791 is 1979005105462.

It is a happy number.

It is not a de Polignac number, because 2645015009791 - 2⁵ = 2645015009759 is a prime.

It is a super-2 number, since 2×2645015009791² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645015009771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144322116 + ... + 144340441.

It is an arithmetic number, because the mean of its divisors is an integer number (148083892254).

Almost surely, 2^{2645015009791} is an apocalyptic number.

2645015009791 is a deficient number, since it is larger than the sum of its proper divisors (908998404305).

2645015009791 is a wasteful number, since it uses less digits than its factorization.

2645015009791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288662599 (or 288662592 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 2645015009791 in words is "two trillion, six hundred forty-five billion, fifteen million, nine thousand, seven hundred ninety-one".