2635719978134 has 4 divisors (see below), whose sum is σ = 3953579967204. Its totient is φ = 1317859989066.

The previous prime is 2635719978097. The next prime is 2635719978139. The reversal of 2635719978134 is 4318799175362.

2635719978134 is digitally balanced in base 2, 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 is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2635719978139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658929994532 + ... + 658929994535.

It is an arithmetic number, because the mean of its divisors is an integer number (988394991801).

Almost surely, 2^{2635719978134} is an apocalyptic number.

2635719978134 is a deficient number, since it is larger than the sum of its proper divisors (1317859989070).

2635719978134 is a wasteful number, since it uses less digits than its factorization.

2635719978134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317859989069.

The product of its digits is 68584320, while the sum is 65.

The spelling of 2635719978134 in words is "two trillion, six hundred thirty-five billion, seven hundred nineteen million, nine hundred seventy-eight thousand, one hundred thirty-four".