2634138661373 has 4 divisors (see below), whose sum is σ = 2719110876288. Its totient is φ = 2549166446460.

The previous prime is 2634138661369. The next prime is 2634138661393. The reversal of 2634138661373 is 3731668314362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2634138661373 - 2² = 2634138661369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2634138661303) 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, 42486107411 + ... + 42486107472.

It is an arithmetic number, because the mean of its divisors is an integer number (679777719072).

Almost surely, 2^{2634138661373} is an apocalyptic number.

It is an amenable number.

2634138661373 is a deficient number, since it is larger than the sum of its proper divisors (84972214915).

2634138661373 is an equidigital number, since it uses as much as digits as its factorization.

2634138661373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84972214914.

The product of its digits is 7838208, while the sum is 53.

The spelling of 2634138661373 in words is "two trillion, six hundred thirty-four billion, one hundred thirty-eight million, six hundred sixty-one thousand, three hundred seventy-three".