7206781672 has 8 divisors (see below), whose sum is σ = 13512715650. Its totient is φ = 3603390832.

The previous prime is 7206781669. The next prime is 7206781679. The reversal of 7206781672 is 2761876027.

It can be written as a sum of positive squares in only one way, i.e., 7040216836 + 166564836 = 83906^2 + 12906^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7206781679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450423847 + ... + 450423862.

Almost surely, 2^7206781672 is an apocalyptic number.

It is an amenable number.

7206781672 is a deficient number, since it is larger than the sum of its proper divisors (6305933978).

7206781672 is a wasteful number, since it uses less digits than its factorization.

7206781672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900847715 (or 900847711 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 7206781672 is about 84892.7657224101. The cubic root of 7206781672 is about 1931.5848412173.

The spelling of 7206781672 in words is "seven billion, two hundred six million, seven hundred eighty-one thousand, six hundred seventy-two".