39961456093 has 4 divisors (see below), whose sum is σ = 43035414268. Its totient is φ = 36887497920.

The previous prime is 39961456091. The next prime is 39961456097. The reversal of 39961456093 is 39065416993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39065416993 = 23 ⋅1698496391.

It can be written as a sum of positive squares in 2 ways, for example, as 3851195364 + 36110260729 = 62058^2 + 190027^2 .

It is not a de Polignac number, because 39961456093 - 2¹ = 39961456091 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 (39961456091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536979068 + ... + 1536979093.

It is an arithmetic number, because the mean of its divisors is an integer number (10758853567).

Almost surely, 2^39961456093 is an apocalyptic number.

It is an amenable number.

39961456093 is a deficient number, since it is larger than the sum of its proper divisors (3073958175).

39961456093 is a wasteful number, since it uses less digits than its factorization.

39961456093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073958174.

The product of its (nonzero) digits is 4723920, while the sum is 55.

The spelling of 39961456093 in words is "thirty-nine billion, nine hundred sixty-one million, four hundred fifty-six thousand, ninety-three".