39980419978 has 32 divisors (see below), whose sum is σ = 61714224000. Its totient is φ = 19419054336.

The previous prime is 39980419939. The next prime is 39980420009. The reversal of 39980419978 is 87991408993.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3411573 + ... + 3423271.

It is an arithmetic number, because the mean of its divisors is an integer number (1928569500).

Almost surely, 2^39980419978 is an apocalyptic number.

39980419978 is a deficient number, since it is larger than the sum of its proper divisors (21733804022).

39980419978 is a wasteful number, since it uses less digits than its factorization.

39980419978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12126.

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 39980419978 in words is "thirty-nine billion, nine hundred eighty million, four hundred nineteen thousand, nine hundred seventy-eight".