7881122135 has 4 divisors (see below), whose sum is σ = 9457346568. Its totient is φ = 6304897704.

The previous prime is 7881122107. The next prime is 7881122141. The reversal of 7881122135 is 5312211887.

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

It is a cyclic number.

It is not a de Polignac number, because 7881122135 - 2¹⁴ = 7881105751 is a prime.

It is a super-2 number, since 2×7881122135² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 788112209 + ... + 788112218.

It is an arithmetic number, because the mean of its divisors is an integer number (2364336642).

Almost surely, 2^7881122135 is an apocalyptic number.

7881122135 is a deficient number, since it is larger than the sum of its proper divisors (1576224433).

7881122135 is a wasteful number, since it uses less digits than its factorization.

7881122135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576224432.

The product of its digits is 26880, while the sum is 38.

The square root of 7881122135 is about 88775.6843679619. The cubic root of 7881122135 is about 1990.0440328464.

The spelling of 7881122135 in words is "seven billion, eight hundred eighty-one million, one hundred twenty-two thousand, one hundred thirty-five".