39549394690 has 32 divisors (see below), whose sum is σ = 77715204336. Its totient is φ = 14402810880.

The previous prime is 39549394679. The next prime is 39549394697. The reversal of 39549394690 is 9649394593.

39549394690 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 18634161049 + 20915233641 = 136507^2 + 144621^2 .

It is a super-2 number, since 2×39549394690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39549394697) 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, 2074251 + ... + 2093230.

Almost surely, 2^39549394690 is an apocalyptic number.

39549394690 is a deficient number, since it is larger than the sum of its proper divisors (38165809646).

39549394690 is a wasteful number, since it uses less digits than its factorization.

39549394690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167574.

The product of its (nonzero) digits is 28343520, while the sum is 61.

The spelling of 39549394690 in words is "thirty-nine billion, five hundred forty-nine million, three hundred ninety-four thousand, six hundred ninety".