39971499542 has 32 divisors (see below), whose sum is σ = 64952858880. Its totient is φ = 18339138720.

The previous prime is 39971499523. The next prime is 39971499583. The reversal of 39971499542 is 24599417993.

It is a super-2 number, since 2×39971499542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3058073 + ... + 3071115.

It is an arithmetic number, because the mean of its divisors is an integer number (2029776840).

Almost surely, 2^39971499542 is an apocalyptic number.

39971499542 is a deficient number, since it is larger than the sum of its proper divisors (24981359338).

39971499542 is a wasteful number, since it uses less digits than its factorization.

39971499542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13748.

The product of its digits is 22044960, while the sum is 62.

The spelling of 39971499542 in words is "thirty-nine billion, nine hundred seventy-one million, four hundred ninety-nine thousand, five hundred forty-two".