39456025645 has 16 divisors (see below), whose sum is σ = 50139244080. Its totient is φ = 29703988224.

The previous prime is 39456025643. The next prime is 39456025663. The reversal of 39456025645 is 54652065493.

39456025645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 434764201 + 39021261444 = 20851^2 + 197538^2 .

It is a cyclic number.

It is not a de Polignac number, because 39456025645 - 2¹ = 39456025643 is a prime.

It is a super-3 number, since 3×39456025645³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39456025643) 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, 685399 + ... + 740731.

It is an arithmetic number, because the mean of its divisors is an integer number (3133702755).

Almost surely, 2^39456025645 is an apocalyptic number.

It is an amenable number.

39456025645 is a deficient number, since it is larger than the sum of its proper divisors (10683218435).

39456025645 is a wasteful number, since it uses less digits than its factorization.

39456025645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63744.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 39456025645 in words is "thirty-nine billion, four hundred fifty-six million, twenty-five thousand, six hundred forty-five".