7891635142 has 16 divisors (see below), whose sum is σ = 12523104000. Its totient is φ = 3719354760.

The previous prime is 7891635139. The next prime is 7891635197. The reversal of 7891635142 is 2415361987.

It is a junction number, because it is equal to n+sod(n) for n = 7891635092 and 7891635101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514234 + ... + 529357.

It is an arithmetic number, because the mean of its divisors is an integer number (782694000).

Almost surely, 2^7891635142 is an apocalyptic number.

7891635142 is a deficient number, since it is larger than the sum of its proper divisors (4631468858).

7891635142 is a wasteful number, since it uses less digits than its factorization.

7891635142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043811.

The product of its digits is 362880, while the sum is 46.

The square root of 7891635142 is about 88834.8757076859. The cubic root of 7891635142 is about 1990.9285114233.

The spelling of 7891635142 in words is "seven billion, eight hundred ninety-one million, six hundred thirty-five thousand, one hundred forty-two".