39820746779 has 6 divisors (see below), whose sum is σ = 43441536684. Its totient is φ = 36200077220.

The previous prime is 39820746767. The next prime is 39820746781. The reversal of 39820746779 is 97764702893.

It is not a de Polignac number, because 39820746779 - 2¹² = 39820742683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39820746379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 631754 + ... + 691920.

It is an arithmetic number, because the mean of its divisors is an integer number (7240256114).

Almost surely, 2^39820746779 is an apocalyptic number.

39820746779 is a deficient number, since it is larger than the sum of its proper divisors (3620789905).

39820746779 is an frugal number, since it uses more digits than its factorization.

39820746779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120345 (or 60178 counting only the distinct ones).

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 39820746779 in words is "thirty-nine billion, eight hundred twenty million, seven hundred forty-six thousand, seven hundred seventy-nine".