39688945278001 has 4 divisors (see below), whose sum is σ = 40656968333604. Its totient is φ = 38720922222400.

The previous prime is 39688945277987. The next prime is 39688945278107. The reversal of 39688945278001 is 10087254988693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21739614955776 + 17949330322225 = 4662576^2 + 4236665^2 .

It is a cyclic number.

It is not a de Polignac number, because 39688945278001 - 2⁹ = 39688945277489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39688945278901) 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, 484011527740 + ... + 484011527821.

It is an arithmetic number, because the mean of its divisors is an integer number (10164242083401).

It is a 1-persistent number, because it is pandigital, but 2⋅39688945278001 = 79377890556002 is not.

Almost surely, 2^{39688945278001} is an apocalyptic number.

It is an amenable number.

39688945278001 is a deficient number, since it is larger than the sum of its proper divisors (968023055603).

39688945278001 is an equidigital number, since it uses as much as digits as its factorization.

39688945278001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968023055602.

The product of its (nonzero) digits is 209018880, while the sum is 70.

The spelling of 39688945278001 in words is "thirty-nine trillion, six hundred eighty-eight billion, nine hundred forty-five million, two hundred seventy-eight thousand, one".