2764344961421 has 18 divisors (see below), whose sum is σ = 2922250592010. Its totient is φ = 2611837342912.

The previous prime is 2764344961403. The next prime is 2764344961451. The reversal of 2764344961421 is 1241694434672.

It can be written as a sum of positive squares in 3 ways, for example, as 1609764625225 + 1154580336196 = 1268765^2 + 1074514^2 .

It is not a de Polignac number, because 2764344961421 - 2²² = 2764340767117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2764344961451) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 420813425 + ... + 420819993.

Almost surely, 2^{2764344961421} is an apocalyptic number.

It is an amenable number.

2764344961421 is a deficient number, since it is larger than the sum of its proper divisors (157905630589).

2764344961421 is an frugal number, since it uses more digits than its factorization.

2764344961421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13261 (or 6645 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 53.

The spelling of 2764344961421 in words is "two trillion, seven hundred sixty-four billion, three hundred forty-four million, nine hundred sixty-one thousand, four hundred twenty-one".