855774886642 has 32 divisors (see below), whose sum is σ = 1385421206400. Its totient is φ = 394111837440.

The previous prime is 855774886627. The next prime is 855774886657. The reversal of 855774886642 is 246688477558.

It is an interprime number because it is at equal distance from previous prime (855774886627) and next prime (855774886657).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75068859 + ... + 75080257.

It is an arithmetic number, because the mean of its divisors is an integer number (43294412700).

Almost surely, 2^855774886642 is an apocalyptic number.

855774886642 is a deficient number, since it is larger than the sum of its proper divisors (529646319758).

855774886642 is a wasteful number, since it uses less digits than its factorization.

855774886642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17458.

The product of its digits is 722534400, while the sum is 70.

The spelling of 855774886642 in words is "eight hundred fifty-five billion, seven hundred seventy-four million, eight hundred eighty-six thousand, six hundred forty-two".