81762625801 has 2 divisors, whose sum is σ = 81762625802. Its totient is φ = 81762625800.

The previous prime is 81762625783. The next prime is 81762625811. The reversal of 81762625801 is 10852626718.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63731507401 + 18031118400 = 252451^2 + 134280^2 .

It is a cyclic number.

It is not a de Polignac number, because 81762625801 - 2¹³ = 81762617609 is a prime.

It is not a weakly prime, because it can be changed into another prime (81762625811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40881312900 + 40881312901.

It is an arithmetic number, because the mean of its divisors is an integer number (40881312901).

Almost surely, 2^81762625801 is an apocalyptic number.

It is an amenable number.

81762625801 is a deficient number, since it is larger than the sum of its proper divisors (1).

81762625801 is an equidigital number, since it uses as much as digits as its factorization.

81762625801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 81762625801 in words is "eighty-one billion, seven hundred sixty-two million, six hundred twenty-five thousand, eight hundred one".