851745851742 has 16 divisors (see below), whose sum is σ = 1703723590800. Its totient is φ = 283876636032.

The previous prime is 851745851683. The next prime is 851745851767. The reversal of 851745851742 is 247158547158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9614203 + ... + 9702390.

It is an arithmetic number, because the mean of its divisors is an integer number (106482724425).

Almost surely, 2^851745851742 is an apocalyptic number.

851745851742 is an abundant number, since it is smaller than the sum of its proper divisors (851977739058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851745851742 is a wasteful number, since it uses less digits than its factorization.

851745851742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19323947.

The product of its digits is 12544000, while the sum is 57.

The spelling of 851745851742 in words is "eight hundred fifty-one billion, seven hundred forty-five million, eight hundred fifty-one thousand, seven hundred forty-two".