2634369781 has 2 divisors, whose sum is σ = 2634369782. Its totient is φ = 2634369780.

The previous prime is 2634369767. The next prime is 2634369809. The reversal of 2634369781 is 1879634362.

2634369781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2386811025 + 247558756 = 48855^2 + 15734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2634369781 - 2¹⁷ = 2634238709 is a prime.

It is a super-2 number, since 2×2634369781² = 13879808286091975922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2634369701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317184890 + 1317184891.

It is an arithmetic number, because the mean of its divisors is an integer number (1317184891).

Almost surely, 2^2634369781 is an apocalyptic number.

It is an amenable number.

2634369781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2634369781 is an equidigital number, since it uses as much as digits as its factorization.

2634369781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 49.

The square root of 2634369781 is about 51326.1120775770. The cubic root of 2634369781 is about 1381.1014417706.

The spelling of 2634369781 in words is "two billion, six hundred thirty-four million, three hundred sixty-nine thousand, seven hundred eighty-one".