842621516494 has 4 divisors (see below), whose sum is σ = 1263932274744. Its totient is φ = 421310758246.

The previous prime is 842621516479. The next prime is 842621516497. The reversal of 842621516494 is 494615126248.

842621516494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×842621516494² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842621516497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210655379122 + ... + 210655379125.

It is an arithmetic number, because the mean of its divisors is an integer number (315983068686).

Almost surely, 2^842621516494 is an apocalyptic number.

842621516494 is a deficient number, since it is larger than the sum of its proper divisors (421310758250).

842621516494 is a wasteful number, since it uses less digits than its factorization.

842621516494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421310758249.

The product of its digits is 3317760, while the sum is 52.

The spelling of 842621516494 in words is "eight hundred forty-two billion, six hundred twenty-one million, five hundred sixteen thousand, four hundred ninety-four".