7877640612445 has 8 divisors (see below), whose sum is σ = 9487295699544. Its totient is φ = 6279361180224.

The previous prime is 7877640612377. The next prime is 7877640612497. The reversal of 7877640612445 is 5442160467787.

It can be written as a sum of positive squares in 4 ways, for example, as 111531285369 + 7766109327076 = 333963^2 + 2786774^2 .

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 7877640612445 - 2³³ = 7869050677853 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 2843912194 + ... + 2843914963.

It is an arithmetic number, because the mean of its divisors is an integer number (1185911962443).

Almost surely, 2^{7877640612445} is an apocalyptic number.

It is an amenable number.

7877640612445 is a deficient number, since it is larger than the sum of its proper divisors (1609655087099).

7877640612445 is a wasteful number, since it uses less digits than its factorization.

7877640612445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687827439.

The product of its (nonzero) digits is 63221760, while the sum is 61.

The spelling of 7877640612445 in words is "seven trillion, eight hundred seventy-seven billion, six hundred forty million, six hundred twelve thousand, four hundred forty-five".