7678137134091 has 4 divisors (see below), whose sum is σ = 10237516178792. Its totient is φ = 5118758089392.

The previous prime is 7678137133999. The next prime is 7678137134123. The reversal of 7678137134091 is 1904317318767.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7678137134091 - 2²⁵ = 7678103579659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7678137139091) 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, 1279689522346 + ... + 1279689522351.

It is an arithmetic number, because the mean of its divisors is an integer number (2559379044698).

Almost surely, 2^{7678137134091} is an apocalyptic number.

7678137134091 is a deficient number, since it is larger than the sum of its proper divisors (2559379044701).

7678137134091 is a wasteful number, since it uses less digits than its factorization.

7678137134091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559379044700.

The product of its (nonzero) digits is 5334336, while the sum is 57.

The spelling of 7678137134091 in words is "seven trillion, six hundred seventy-eight billion, one hundred thirty-seven million, one hundred thirty-four thousand, ninety-one".