39919966540 has 48 divisors (see below), whose sum is σ = 84086140320. Its totient is φ = 15919649280.

The previous prime is 39919966523. The next prime is 39919966543. The reversal of 39919966540 is 4566991993.

It is not an unprimeable number, because it can be changed into a prime (39919966543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10589776 + ... + 10593544.

It is an arithmetic number, because the mean of its divisors is an integer number (1751794590).

Almost surely, 2^39919966540 is an apocalyptic number.

It is an amenable number.

39919966540 is an abundant number, since it is smaller than the sum of its proper divisors (44166173780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39919966540 is a wasteful number, since it uses less digits than its factorization.

39919966540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5242 (or 5240 counting only the distinct ones).

The product of its (nonzero) digits is 14171760, while the sum is 61.

The spelling of 39919966540 in words is "thirty-nine billion, nine hundred nineteen million, nine hundred sixty-six thousand, five hundred forty".