347640514870781 has 8 divisors (see below), whose sum is σ = 379244524043424. Its totient is φ = 316036560031920.

The previous prime is 347640514870729. The next prime is 347640514870783. The reversal of 347640514870781 is 187078415046743.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 347640514870781 - 2²² = 347640510676477 is a prime.

It is a super-2 number, since 2×347640514870781² (a number of 30 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 (347640514870783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422606 + ... + 26371568.

It is an arithmetic number, because the mean of its divisors is an integer number (47405565505428).

Almost surely, 2^{347640514870781} is an apocalyptic number.

It is an amenable number.

347640514870781 is a deficient number, since it is larger than the sum of its proper divisors (31604009172643).

347640514870781 is a wasteful number, since it uses less digits than its factorization.

347640514870781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27166891.

The product of its (nonzero) digits is 126443520, while the sum is 65.

The spelling of 347640514870781 in words is "three hundred forty-seven trillion, six hundred forty billion, five hundred fourteen million, eight hundred seventy thousand, seven hundred eighty-one".