1961545808 has 10 divisors (see below), whose sum is σ = 3800495034. Its totient is φ = 980772896.

The previous prime is 1961545783. The next prime is 1961545837. The reversal of 1961545808 is 8085451691.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1665292864 + 296252944 = 40808^2 + 17212^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61298291 + ... + 61298322.

Almost surely, 2^1961545808 is an apocalyptic number.

It is an amenable number.

1961545808 is a deficient number, since it is larger than the sum of its proper divisors (1838949226).

1961545808 is a wasteful number, since it uses less digits than its factorization.

1961545808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122596621 (or 122596615 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 1961545808 is about 44289.3419233115. The cubic root of 1961545808 is about 1251.7938634517.

The spelling of 1961545808 in words is "one billion, nine hundred sixty-one million, five hundred forty-five thousand, eight hundred eight".