2949615561823 has 18 divisors (see below), whose sum is σ = 3379386478632. Its totient is φ = 2521959600960.

The previous prime is 2949615561799. The next prime is 2949615561931. The reversal of 2949615561823 is 3281655169492.

It is a happy number.

It is not a de Polignac number, because 2949615561823 - 2⁵ = 2949615561791 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 (2949615561523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3457931065 + ... + 3457931917.

Almost surely, 2^{2949615561823} is an apocalyptic number.

2949615561823 is a deficient number, since it is larger than the sum of its proper divisors (429770916809).

2949615561823 is an frugal number, since it uses more digits than its factorization.

2949615561823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235 (or 1621 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 61.

The spelling of 2949615561823 in words is "two trillion, nine hundred forty-nine billion, six hundred fifteen million, five hundred sixty-one thousand, eight hundred twenty-three".