7626381321 has 16 divisors (see below), whose sum is σ = 11100715136. Its totient is φ = 4628866176.

The previous prime is 7626381319. The next prime is 7626381383. The reversal of 7626381321 is 1231836267.

It is not a de Polignac number, because 7626381321 - 2¹ = 7626381319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7626381321.

It is not an unprimeable number, because it can be changed into a prime (7626381221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1336525 + ... + 1342218.

It is an arithmetic number, because the mean of its divisors is an integer number (693794696).

Almost surely, 2^7626381321 is an apocalyptic number.

It is an amenable number.

7626381321 is a deficient number, since it is larger than the sum of its proper divisors (3474333815).

7626381321 is a wasteful number, since it uses less digits than its factorization.

7626381321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678832.

The product of its digits is 72576, while the sum is 39.

The square root of 7626381321 is about 87329.1550457234. The cubic root of 7626381321 is about 1968.3674382813.

The spelling of 7626381321 in words is "seven billion, six hundred twenty-six million, three hundred eighty-one thousand, three hundred twenty-one".