7811921434 has 8 divisors (see below), whose sum is σ = 12227355360. Its totient is φ = 3736136316.

The previous prime is 7811921431. The next prime is 7811921483. The reversal of 7811921434 is 4341291187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7811921434² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7811921431) 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, 84912144 + ... + 84912235.

It is an arithmetic number, because the mean of its divisors is an integer number (1528419420).

Almost surely, 2^7811921434 is an apocalyptic number.

7811921434 is a deficient number, since it is larger than the sum of its proper divisors (4415433926).

7811921434 is a wasteful number, since it uses less digits than its factorization.

7811921434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169824404.

The product of its digits is 48384, while the sum is 40.

The square root of 7811921434 is about 88385.0747241863. The cubic root of 7811921434 is about 1984.2023315496.

The spelling of 7811921434 in words is "seven billion, eight hundred eleven million, nine hundred twenty-one thousand, four hundred thirty-four".