39955558787 has 8 divisors (see below), whose sum is σ = 40058201040. Its totient is φ = 39853023840.

The previous prime is 39955558697. The next prime is 39955558789. The reversal of 39955558787 is 78785555993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39955558787 is a prime.

It is a super-2 number, since 2×39955558787² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39955558787.

It is not an unprimeable number, because it can be changed into a prime (39955558789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747248 + ... + 798930.

It is an arithmetic number, because the mean of its divisors is an integer number (5007275130).

Almost surely, 2^39955558787 is an apocalyptic number.

39955558787 is a deficient number, since it is larger than the sum of its proper divisors (102642253).

39955558787 is a wasteful number, since it uses less digits than its factorization.

39955558787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53653.

The product of its digits is 476280000, while the sum is 71.

The spelling of 39955558787 in words is "thirty-nine billion, nine hundred fifty-five million, five hundred fifty-eight thousand, seven hundred eighty-seven".