721278914112 has 168 divisors, whose sum is σ = 2164806943936. Its totient is φ = 238091539968.

The previous prime is 721278914099. The next prime is 721278914129. The reversal of 721278914112 is 211419872127.

721278914112 is a `hidden beast` number, since 72 + 12 + 78 + 91 + 411 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1376718 + ... + 1826994.

Almost surely, 2^721278914112 is an apocalyptic number.

721278914112 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721278914112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082403471968).

721278914112 is an abundant number, since it is smaller than the sum of its proper divisors (1443528029824).

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

721278914112 is a wasteful number, since it uses less digits than its factorization.

721278914112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450407 (or 450385 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The spelling of 721278914112 in words is "seven hundred twenty-one billion, two hundred seventy-eight million, nine hundred fourteen thousand, one hundred twelve".