2731557763397 has 4 divisors (see below), whose sum is σ = 2735690226636. Its totient is φ = 2727425300160.

The previous prime is 2731557763393. The next prime is 2731557763399. The reversal of 2731557763397 is 7933677551372.

2731557763397 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 1993515262561 + 738042500836 = 1411919^2 + 859094^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731557763397 - 2² = 2731557763393 is a prime.

It is a super-2 number, since 2×2731557763397² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731557763393) 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, 2066230628 + ... + 2066231949.

It is an arithmetic number, because the mean of its divisors is an integer number (683922556659).

Almost surely, 2^{2731557763397} is an apocalyptic number.

It is an amenable number.

2731557763397 is a deficient number, since it is larger than the sum of its proper divisors (4132463239).

2731557763397 is an equidigital number, since it uses as much as digits as its factorization.

2731557763397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132463238.

The product of its digits is 175032900, while the sum is 65.

The spelling of 2731557763397 in words is "two trillion, seven hundred thirty-one billion, five hundred fifty-seven million, seven hundred sixty-three thousand, three hundred ninety-seven".