93719820665 has 16 divisors (see below), whose sum is σ = 113280584400. Its totient is φ = 74431875840.

The previous prime is 93719820661. The next prime is 93719820671. The reversal of 93719820665 is 56602891739.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17777688889 + 75942131776 = 133333^2 + 275576^2 .

It is not a de Polignac number, because 93719820665 - 2² = 93719820661 is a prime.

It is a super-2 number, since 2×93719820665² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 93719820665.

It is not an unprimeable number, because it can be changed into a prime (93719820661) 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, 1364855 + ... + 1431875.

It is an arithmetic number, because the mean of its divisors is an integer number (7080036525).

Almost surely, 2^93719820665 is an apocalyptic number.

It is an amenable number.

93719820665 is a deficient number, since it is larger than the sum of its proper divisors (19560763735).

93719820665 is a wasteful number, since it uses less digits than its factorization.

93719820665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69052.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 93719820665 in words is "ninety-three billion, seven hundred nineteen million, eight hundred twenty thousand, six hundred sixty-five".