39946519481 has 16 divisors (see below), whose sum is σ = 45132431040. Its totient is φ = 35022550080.

The previous prime is 39946519477. The next prime is 39946519489. The reversal of 39946519481 is 18491564993.

It is a cyclic number.

It is not a de Polignac number, because 39946519481 - 2² = 39946519477 is a prime.

It is a super-2 number, since 2×39946519481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39946519481.

It is not an unprimeable number, because it can be changed into a prime (39946519489) 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, 208370 + ... + 351156.

It is an arithmetic number, because the mean of its divisors is an integer number (2820776940).

Almost surely, 2^39946519481 is an apocalyptic number.

It is an amenable number.

39946519481 is a deficient number, since it is larger than the sum of its proper divisors (5185911559).

39946519481 is a wasteful number, since it uses less digits than its factorization.

39946519481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143704.

The product of its digits is 8398080, while the sum is 59.

The spelling of 39946519481 in words is "thirty-nine billion, nine hundred forty-six million, five hundred nineteen thousand, four hundred eighty-one".