39920009613 has 32 divisors (see below), whose sum is σ = 59167729152. Its totient is φ = 23737560000.

The previous prime is 39920009609. The next prime is 39920009617. The reversal of 39920009613 is 31690002993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39920009609) and next prime (39920009617).

It is not a de Polignac number, because 39920009613 - 2² = 39920009609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39920009617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 518995 + ... + 590927.

It is an arithmetic number, because the mean of its divisors is an integer number (1848991536).

Almost surely, 2^39920009613 is an apocalyptic number.

39920009613 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

39920009613 is a deficient number, since it is larger than the sum of its proper divisors (19247719539).

39920009613 is a wasteful number, since it uses less digits than its factorization.

39920009613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72265.

The product of its (nonzero) digits is 78732, while the sum is 42.

The spelling of 39920009613 in words is "thirty-nine billion, nine hundred twenty million, nine thousand, six hundred thirteen".