1961393178 has 16 divisors (see below), whose sum is σ = 4018464576. Its totient is φ = 637851360.

The previous prime is 1961393171. The next prime is 1961393183. The reversal of 1961393178 is 8713931691.

1961393178 is digitally balanced in base 4, 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 (1961393171) 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, 3986326 + ... + 3986817.

It is an arithmetic number, because the mean of its divisors is an integer number (251154036).

Almost surely, 2^1961393178 is an apocalyptic number.

1961393178 is an abundant number, since it is smaller than the sum of its proper divisors (2057071398).

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

1961393178 is a wasteful number, since it uses less digits than its factorization.

1961393178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7973189.

The product of its digits is 244944, while the sum is 48.

The square root of 1961393178 is about 44287.6187890024. The cubic root of 1961393178 is about 1251.7613947982.

The spelling of 1961393178 in words is "one billion, nine hundred sixty-one million, three hundred ninety-three thousand, one hundred seventy-eight".