3811272455421 has 12 divisors (see below), whose sum is σ = 5507095573980. Its totient is φ = 2539960188480.

The previous prime is 3811272455401. The next prime is 3811272455423. The reversal of 3811272455421 is 1245542721183.

It is a happy number.

3811272455421 is a `hidden beast` number, since 3 + 8 + 1 + 1 + 2 + 72 + 4 + 554 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1612546959321 + 2198725496100 = 1269861^2 + 1482810^2 .

It is not a de Polignac number, because 3811272455421 - 2¹⁵ = 3811272422653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811272455423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73982416 + ... + 74033913.

It is an arithmetic number, because the mean of its divisors is an integer number (458924631165).

Almost surely, 2^{3811272455421} is an apocalyptic number.

It is an amenable number.

3811272455421 is a deficient number, since it is larger than the sum of its proper divisors (1695823118559).

3811272455421 is a wasteful number, since it uses less digits than its factorization.

3811272455421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148019196 (or 148019193 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The spelling of 3811272455421 in words is "three trillion, eight hundred eleven billion, two hundred seventy-two million, four hundred fifty-five thousand, four hundred twenty-one".