83507681493 has 12 divisors (see below), whose sum is σ = 121489994080. Its totient is φ = 55271270376.

The previous prime is 83507681483. The next prime is 83507681513. The reversal of 83507681493 is 39418670538.

83507681493 is a `hidden beast` number, since 8 + 3 + 5 + 0 + 76 + 81 + 493 = 666.

It is not a de Polignac number, because 83507681493 - 2¹⁶ = 83507615957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83507681483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33375121 + ... + 33377622.

Almost surely, 2^83507681493 is an apocalyptic number.

It is an amenable number.

83507681493 is a deficient number, since it is larger than the sum of its proper divisors (37982312587).

83507681493 is a wasteful number, since it uses less digits than its factorization.

83507681493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66752888 (or 66752885 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 83507681493 in words is "eighty-three billion, five hundred seven million, six hundred eighty-one thousand, four hundred ninety-three".