2947686847641 has 6 divisors (see below), whose sum is σ = 4257769891050. Its totient is φ = 1965124565088.

The previous prime is 2947686847621. The next prime is 2947686847669. The reversal of 2947686847641 is 1467486867492.

2947686847641 is a `hidden beast` number, since 2 + 9 + 4 + 76 + 86 + 8 + 476 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1681420516416 + 1266266331225 = 1296696^2 + 1125285^2 .

It is not a de Polignac number, because 2947686847641 - 2²⁷ = 2947552629913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2947686847641.

It is not an unprimeable number, because it can be changed into a prime (2947686847621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163760380416 + ... + 163760380433.

It is an arithmetic number, because the mean of its divisors is an integer number (709628315175).

Almost surely, 2^{2947686847641} is an apocalyptic number.

It is an amenable number.

2947686847641 is a deficient number, since it is larger than the sum of its proper divisors (1310083043409).

2947686847641 is a wasteful number, since it uses less digits than its factorization.

2947686847641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327520760855 (or 327520760852 counting only the distinct ones).

The product of its digits is 780337152, while the sum is 72.

The spelling of 2947686847641 in words is "two trillion, nine hundred forty-seven billion, six hundred eighty-six million, eight hundred forty-seven thousand, six hundred forty-one".