2646731089477 has 4 divisors (see below), whose sum is σ = 2646741587980. Its totient is φ = 2646720590976.

The previous prime is 2646731089469. The next prime is 2646731089507. The reversal of 2646731089477 is 7749801376462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 998398641601 + 1648332447876 = 999199^2 + 1283874^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646731089477 - 2³ = 2646731089469 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 (2646731089427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4861548 + ... + 5378485.

It is an arithmetic number, because the mean of its divisors is an integer number (661685396995).

Almost surely, 2^{2646731089477} is an apocalyptic number.

It is an amenable number.

2646731089477 is a deficient number, since it is larger than the sum of its proper divisors (10498503).

2646731089477 is a wasteful number, since it uses less digits than its factorization.

2646731089477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10498502.

The product of its (nonzero) digits is 85349376, while the sum is 64.

The spelling of 2646731089477 in words is "two trillion, six hundred forty-six billion, seven hundred thirty-one million, eighty-nine thousand, four hundred seventy-seven".