6420819094971 has 8 divisors (see below), whose sum is σ = 8856302200080. Its totient is φ = 4132941026592.

The previous prime is 6420819094969. The next prime is 6420819094999. The reversal of 6420819094971 is 1794909180246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6420819094971 - 2¹ = 6420819094969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6420819094901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36901259080 + ... + 36901259253.

It is an arithmetic number, because the mean of its divisors is an integer number (1107037775010).

Almost surely, 2^{6420819094971} is an apocalyptic number.

6420819094971 is a deficient number, since it is larger than the sum of its proper divisors (2435483105109).

6420819094971 is a wasteful number, since it uses less digits than its factorization.

6420819094971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73802518365.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 6420819094971 in words is "six trillion, four hundred twenty billion, eight hundred nineteen million, ninety-four thousand, nine hundred seventy-one".