2615787556791 has 16 divisors (see below), whose sum is σ = 3521725069824. Its totient is φ = 1726855621344.

The previous prime is 2615787556783. The next prime is 2615787556793. The reversal of 2615787556791 is 1976557875162.

It is not a de Polignac number, because 2615787556791 - 2³ = 2615787556783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2615787556793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7822965 + ... + 8150481.

It is an arithmetic number, because the mean of its divisors is an integer number (220107816864).

Almost surely, 2^{2615787556791} is an apocalyptic number.

2615787556791 is a deficient number, since it is larger than the sum of its proper divisors (905937513033).

2615787556791 is a wasteful number, since it uses less digits than its factorization.

2615787556791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353470.

The product of its digits is 222264000, while the sum is 69.

The spelling of 2615787556791 in words is "two trillion, six hundred fifteen billion, seven hundred eighty-seven million, five hundred fifty-six thousand, seven hundred ninety-one".