855810374642 has 4 divisors (see below), whose sum is σ = 1283715561966. Its totient is φ = 427905187320.

The previous prime is 855810374641. The next prime is 855810374647. The reversal of 855810374642 is 246473018558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 481096219321 + 374714155321 = 693611^2 + 612139^2 .

It is a super-2 number, since 2×855810374642² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855810374641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213952593659 + ... + 213952593662.

Almost surely, 2^855810374642 is an apocalyptic number.

855810374642 is a deficient number, since it is larger than the sum of its proper divisors (427905187324).

855810374642 is a wasteful number, since it uses less digits than its factorization.

855810374642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427905187323.

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 855810374642 in words is "eight hundred fifty-five billion, eight hundred ten million, three hundred seventy-four thousand, six hundred forty-two".