7206721056156 has 24 divisors (see below), whose sum is σ = 17018281050624. Its totient is φ = 2373297696880.

The previous prime is 7206721056131. The next prime is 7206721056203. The reversal of 7206721056156 is 6516501276027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3617830860 + ... + 3617832851.

It is an arithmetic number, because the mean of its divisors is an integer number (709095043776).

Almost surely, 2^{7206721056156} is an apocalyptic number.

It is an amenable number.

7206721056156 is an abundant number, since it is smaller than the sum of its proper divisors (9811559994468).

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

7206721056156 is a wasteful number, since it uses less digits than its factorization.

7206721056156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7235663801 (or 7235663799 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 7206721056156 in words is "seven trillion, two hundred six billion, seven hundred twenty-one million, fifty-six thousand, one hundred fifty-six".