71277909822 has 64 divisors (see below), whose sum is σ = 190550822400. Its totient is φ = 19293266880.

The previous prime is 71277909793. The next prime is 71277909847. The reversal of 71277909822 is 22890977217.

It is a happy number.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4955079 + ... + 4969442.

It is an arithmetic number, because the mean of its divisors is an integer number (2977356600).

Almost surely, 2^71277909822 is an apocalyptic number.

71277909822 is an abundant number, since it is smaller than the sum of its proper divisors (119272912578).

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

71277909822 is a wasteful number, since it uses less digits than its factorization.

71277909822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9924558 (or 9924552 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 71277909822 in words is "seventy-one billion, two hundred seventy-seven million, nine hundred nine thousand, eight hundred twenty-two".