79121628434 has 8 divisors (see below), whose sum is σ = 118683847740. Its totient is φ = 39560345856.

The previous prime is 79121628419. The next prime is 79121628437. The reversal of 79121628434 is 43482612197.

It can be written as a sum of positive squares in 2 ways, for example, as 78987416209 + 134212225 = 281047^2 + 11585^2 .

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

It is not an unprimeable number, because it can be changed into a prime (79121628437) 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, 42242 + ... + 400034.

Almost surely, 2^79121628434 is an apocalyptic number.

79121628434 is a deficient number, since it is larger than the sum of its proper divisors (39562219306).

79121628434 is a wasteful number, since it uses less digits than its factorization.

79121628434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468364.

The product of its digits is 580608, while the sum is 47.

The spelling of 79121628434 in words is "seventy-nine billion, one hundred twenty-one million, six hundred twenty-eight thousand, four hundred thirty-four".