2661930261813 has 32 divisors (see below), whose sum is σ = 3856962703360. Its totient is φ = 1626816337920.

The previous prime is 2661930261803. The next prime is 2661930261827. The reversal of 2661930261813 is 3181620391662.

It is not a de Polignac number, because 2661930261813 - 2¹³ = 2661930253621 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 (2661930261803) 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 31 ways as a sum of consecutive naturals, for example, 18025845 + ... + 18172917.

It is an arithmetic number, because the mean of its divisors is an integer number (120530084480).

Almost surely, 2^{2661930261813} is an apocalyptic number.

It is an amenable number.

2661930261813 is a deficient number, since it is larger than the sum of its proper divisors (1195032441547).

2661930261813 is a wasteful number, since it uses less digits than its factorization.

2661930261813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157369.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 2661930261813 in words is "two trillion, six hundred sixty-one billion, nine hundred thirty million, two hundred sixty-one thousand, eight hundred thirteen".