610779978 has 24 divisors (see below), whose sum is σ = 1401201828. Its totient is φ = 191617152.

The previous prime is 610779907. The next prime is 610780081. The reversal of 610779978 is 879977016.

It can be written as a sum of positive squares in 2 ways, for example, as 607967649 + 2812329 = 24657^2 + 1677^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 997701 + ... + 998312.

Almost surely, 2^610779978 is an apocalyptic number.

610779978 is an abundant number, since it is smaller than the sum of its proper divisors (790421850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

610779978 is a wasteful number, since it uses less digits than its factorization.

610779978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996038 (or 1996035 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 54.

The square root of 610779978 is about 24713.9632192006. The cubic root of 610779978 is about 848.4539267924.

The spelling of 610779978 in words is "six hundred ten million, seven hundred seventy-nine thousand, nine hundred seventy-eight".