787645978 has 16 divisors (see below), whose sum is σ = 1351810944. Its totient is φ = 337172400.

The previous prime is 787645961. The next prime is 787645979. The reversal of 787645978 is 879546787.

787645978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (787645979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19798 + ... + 44353.

It is an arithmetic number, because the mean of its divisors is an integer number (84488184).

Almost surely, 2^787645978 is an apocalyptic number.

787645978 is a deficient number, since it is larger than the sum of its proper divisors (564164966).

787645978 is a wasteful number, since it uses less digits than its factorization.

787645978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65037.

The product of its digits is 23708160, while the sum is 61.

The square root of 787645978 is about 28065.0312310534. The cubic root of 787645978 is about 923.5144317878.

The spelling of 787645978 in words is "seven hundred eighty-seven million, six hundred forty-five thousand, nine hundred seventy-eight".