84391372801 has 2 divisors, whose sum is σ = 84391372802. Its totient is φ = 84391372800.

The previous prime is 84391372787. The next prime is 84391372823. The reversal of 84391372801 is 10827319348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79299123201 + 5092249600 = 281601^2 + 71360^2 .

It is a cyclic number.

It is not a de Polignac number, because 84391372801 - 2³¹ = 82243889153 is a prime.

It is not a weakly prime, because it can be changed into another prime (84391372501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42195686400 + 42195686401.

It is an arithmetic number, because the mean of its divisors is an integer number (42195686401).

Almost surely, 2^84391372801 is an apocalyptic number.

It is an amenable number.

84391372801 is a deficient number, since it is larger than the sum of its proper divisors (1).

84391372801 is an equidigital number, since it uses as much as digits as its factorization.

84391372801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 84391372801 in words is "eighty-four billion, three hundred ninety-one million, three hundred seventy-two thousand, eight hundred one".