1980078064 has 20 divisors (see below), whose sum is σ = 3848667856. Its totient is φ = 986873472.

The previous prime is 1980078053. The next prime is 1980078083. The reversal of 1980078064 is 4608700891.

It is a self number, because there is not a number n which added to its sum of digits gives 1980078064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192684 + ... + 202699.

Almost surely, 2^1980078064 is an apocalyptic number.

It is an amenable number.

1980078064 is a deficient number, since it is larger than the sum of its proper divisors (1868589792).

1980078064 is a wasteful number, since it uses less digits than its factorization.

1980078064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395704 (or 395698 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1980078064 is about 44498.0680928959. The cubic root of 1980078064 is about 1255.7237380414.

The spelling of 1980078064 in words is "one billion, nine hundred eighty million, seventy-eight thousand, sixty-four".