81414762783 has 16 divisors (see below), whose sum is σ = 109233360000. Its totient is φ = 53936748320.

The previous prime is 81414762773. The next prime is 81414762787. The reversal of 81414762783 is 38726741418.

It is a cyclic number.

It is not a de Polignac number, because 81414762783 - 2²⁴ = 81397985567 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81414762787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754393 + ... + 855533.

It is an arithmetic number, because the mean of its divisors is an integer number (6827085000).

Almost surely, 2^81414762783 is an apocalyptic number.

81414762783 is a deficient number, since it is larger than the sum of its proper divisors (27818597217).

81414762783 is a wasteful number, since it uses less digits than its factorization.

81414762783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102822.

The product of its digits is 1806336, while the sum is 51.

The spelling of 81414762783 in words is "eighty-one billion, four hundred fourteen million, seven hundred sixty-two thousand, seven hundred eighty-three".