39981935086 has 4 divisors (see below), whose sum is σ = 59972902632. Its totient is φ = 19990967542.

The previous prime is 39981935053. The next prime is 39981935113. The reversal of 39981935086 is 68053918993.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×39981935086² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9995483770 + ... + 9995483773.

It is an arithmetic number, because the mean of its divisors is an integer number (14993225658).

Almost surely, 2^39981935086 is an apocalyptic number.

39981935086 is a deficient number, since it is larger than the sum of its proper divisors (19990967546).

39981935086 is a wasteful number, since it uses less digits than its factorization.

39981935086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19990967545.

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 39981935086 in words is "thirty-nine billion, nine hundred eighty-one million, nine hundred thirty-five thousand, eighty-six".