1961166040 has 16 divisors (see below), whose sum is σ = 4412623680. Its totient is φ = 784466400.

The previous prime is 1961166037. The next prime is 1961166083. The reversal of 1961166040 is 406611691.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1961165987 and 1961166005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24514536 + ... + 24514615.

It is an arithmetic number, because the mean of its divisors is an integer number (275788980).

Almost surely, 2^1961166040 is an apocalyptic number.

1961166040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1961166040 is an abundant number, since it is smaller than the sum of its proper divisors (2451457640).

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

1961166040 is a wasteful number, since it uses less digits than its factorization.

1961166040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49029162 (or 49029158 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1961166040 is about 44285.0543637467. The cubic root of 1961166040 is about 1251.7130730986.

The spelling of 1961166040 in words is "one billion, nine hundred sixty-one million, one hundred sixty-six thousand, forty".