1961850012 has 12 divisors (see below), whose sum is σ = 4577650056. Its totient is φ = 653950000.

The previous prime is 1961849999. The next prime is 1961850013. The reversal of 1961850012 is 2100581691.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961850013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81743739 + ... + 81743762.

It is an arithmetic number, because the mean of its divisors is an integer number (381470838).

Almost surely, 2^1961850012 is an apocalyptic number.

1961850012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1961850012 is an abundant number, since it is smaller than the sum of its proper divisors (2615800044).

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

1961850012 is a wasteful number, since it uses less digits than its factorization.

1961850012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163487508 (or 163487506 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 33.

The square root of 1961850012 is about 44292.7760701449. The cubic root of 1961850012 is about 1251.8585710945.

The spelling of 1961850012 in words is "one billion, nine hundred sixty-one million, eight hundred fifty thousand, twelve".