1961096401 has 4 divisors (see below), whose sum is σ = 2139377904. Its totient is φ = 1782814900.

The previous prime is 1961096393. The next prime is 1961096437. The reversal of 1961096401 is 1046901691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1961096401 - 2³ = 1961096393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961096441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89140735 + ... + 89140756.

It is an arithmetic number, because the mean of its divisors is an integer number (534844476).

Almost surely, 2^1961096401 is an apocalyptic number.

1961096401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1961096401 is a deficient number, since it is larger than the sum of its proper divisors (178281503).

1961096401 is a wasteful number, since it uses less digits than its factorization.

1961096401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178281502.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1961096401 is about 44284.2680982762. The cubic root of 1961096401 is about 1251.6982572397.

The spelling of 1961096401 in words is "one billion, nine hundred sixty-one million, ninety-six thousand, four hundred one".