81214298836 has 24 divisors (see below), whose sum is σ = 156266320896. Its totient is φ = 36624913920.

The previous prime is 81214298831. The next prime is 81214298903. The reversal of 81214298836 is 63889241218.

It is a super-2 number, since 2×81214298836² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81214298831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7261261 + ... + 7272436.

It is an arithmetic number, because the mean of its divisors is an integer number (6511096704).

Almost surely, 2^81214298836 is an apocalyptic number.

It is an amenable number.

81214298836 is a deficient number, since it is larger than the sum of its proper divisors (75052022060).

81214298836 is a wasteful number, since it uses less digits than its factorization.

81214298836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14533839 (or 14533837 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The spelling of 81214298836 in words is "eighty-one billion, two hundred fourteen million, two hundred ninety-eight thousand, eight hundred thirty-six".