75219121961 has 16 divisors (see below), whose sum is σ = 83298668544. Its totient is φ = 67559906304.

The previous prime is 75219121933. The next prime is 75219121969. The reversal of 75219121961 is 16912191257.

It is a cyclic number.

It is not a de Polignac number, because 75219121961 - 2¹⁰ = 75219120937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75219121969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52841 + ... + 391446.

It is an arithmetic number, because the mean of its divisors is an integer number (5206166784).

Almost surely, 2^75219121961 is an apocalyptic number.

It is an amenable number.

75219121961 is a deficient number, since it is larger than the sum of its proper divisors (8079546583).

75219121961 is a wasteful number, since it uses less digits than its factorization.

75219121961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444760.

The product of its digits is 68040, while the sum is 44.

The spelling of 75219121961 in words is "seventy-five billion, two hundred nineteen million, one hundred twenty-one thousand, nine hundred sixty-one".