6221901651876 has 27 divisors (see below), whose sum is σ = 15727622562561. Its totient is φ = 2073962228544.

The previous prime is 6221901651857. The next prime is 6221901651877. The reversal of 6221901651876 is 6781561091226.

It is a happy number.

The square root of 6221901651876 is 2494374.

It is a perfect power (a square), and thus also a powerful number.

6221901651876 is a `hidden beast` number, since 6 + 2 + 21 + 90 + 16 + 518 + 7 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4487728717476 + 1734172934400 = 2118426^2 + 1316880^2 .

It is not an unprimeable number, because it can be changed into a prime (6221901651877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14758380 + ... + 15174108.

Almost surely, 2^{6221901651876} is an apocalyptic number.

6221901651876 is the 2494374-th square number.

It is an amenable number.

6221901651876 is an abundant number, since it is smaller than the sum of its proper divisors (9505720910685).

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

6221901651876 is an frugal number, since it uses more digits than its factorization.

6221901651876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831468 (or 415734 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 6221901651876 in words is "six trillion, two hundred twenty-one billion, nine hundred one million, six hundred fifty-one thousand, eight hundred seventy-six".