511520978 has 16 divisors (see below), whose sum is σ = 772278624. Its totient is φ = 254100480.

The previous prime is 511520963. The next prime is 511520981. The reversal of 511520978 is 879025115.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238973 + ... + 241103.

It is an arithmetic number, because the mean of its divisors is an integer number (48267414).

Almost surely, 2^511520978 is an apocalyptic number.

511520978 is a deficient number, since it is larger than the sum of its proper divisors (260757646).

511520978 is a wasteful number, since it uses less digits than its factorization.

511520978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 511520978 is about 22616.8295302414. The cubic root of 511520978 is about 799.7504315276.

The spelling of 511520978 in words is "five hundred eleven million, five hundred twenty thousand, nine hundred seventy-eight".