81245030407 has 2 divisors, whose sum is σ = 81245030408. Its totient is φ = 81245030406.

The previous prime is 81245030381. The next prime is 81245030473. The reversal of 81245030407 is 70403054218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81245030407 - 2²³ = 81236641799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81245030507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40622515203 + 40622515204.

It is an arithmetic number, because the mean of its divisors is an integer number (40622515204).

Almost surely, 2^81245030407 is an apocalyptic number.

81245030407 is a deficient number, since it is larger than the sum of its proper divisors (1).

81245030407 is an equidigital number, since it uses as much as digits as its factorization.

81245030407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 81245030407 in words is "eighty-one billion, two hundred forty-five million, thirty thousand, four hundred seven".