671276878538245 has 16 divisors (see below), whose sum is σ = 923340065925888. Its totient is φ = 458938257603840.

The previous prime is 671276878538219. The next prime is 671276878538471. The reversal of 671276878538245 is 542835878672176.

It is not a de Polignac number, because 671276878538245 - 2¹⁹ = 671276878013957 is a prime.

It is a super-2 number, since 2×671276878538245² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28455981361 + ... + 28456004950.

It is an arithmetic number, because the mean of its divisors is an integer number (57708754120368).

Almost surely, 2^{671276878538245} is an apocalyptic number.

It is an amenable number.

671276878538245 is a deficient number, since it is larger than the sum of its proper divisors (252063187387643).

671276878538245 is a wasteful number, since it uses less digits than its factorization.

671276878538245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56911986660.

The product of its digits is 7586611200, while the sum is 79.

The spelling of 671276878538245 in words is "six hundred seventy-one trillion, two hundred seventy-six billion, eight hundred seventy-eight million, five hundred thirty-eight thousand, two hundred forty-five".