1961243455 has 8 divisors (see below), whose sum is σ = 2353844304. Its totient is φ = 1568760000.

The previous prime is 1961243447. The next prime is 1961243467. The reversal of 1961243455 is 5543421691.

1961243455 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1961243455 - 2³ = 1961243447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12955 + ... + 63955.

It is an arithmetic number, because the mean of its divisors is an integer number (294230538).

Almost surely, 2^1961243455 is an apocalyptic number.

1961243455 is a deficient number, since it is larger than the sum of its proper divisors (392600849).

1961243455 is an equidigital number, since it uses as much as digits as its factorization.

1961243455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58697.

The product of its digits is 129600, while the sum is 40.

The square root of 1961243455 is about 44285.9284084685. The cubic root of 1961243455 is about 1251.7295429080.

The spelling of 1961243455 in words is "one billion, nine hundred sixty-one million, two hundred forty-three thousand, four hundred fifty-five".