39746528639 has 4 divisors (see below), whose sum is σ = 40036649424. Its totient is φ = 39456407856.

The previous prime is 39746528609. The next prime is 39746528641. The reversal of 39746528639 is 93682564793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93682564793 = 23 ⋅4073154991.

It is a cyclic number.

It is not a de Polignac number, because 39746528639 - 2¹⁶ = 39746463103 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 (39746528609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145060187 + ... + 145060460.

It is an arithmetic number, because the mean of its divisors is an integer number (10009162356).

Almost surely, 2^39746528639 is an apocalyptic number.

39746528639 is a deficient number, since it is larger than the sum of its proper divisors (290120785).

39746528639 is a wasteful number, since it uses less digits than its factorization.

39746528639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290120784.

The product of its digits is 58786560, while the sum is 62.

The spelling of 39746528639 in words is "thirty-nine billion, seven hundred forty-six million, five hundred twenty-eight thousand, six hundred thirty-nine".