75967450021 has 4 divisors (see below), whose sum is σ = 75969329292. Its totient is φ = 75965570752.

The previous prime is 75967450019. The next prime is 75967450037. The reversal of 75967450021 is 12005476957.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12005476957 = 23 ⋅521977259.

It can be written as a sum of positive squares in 2 ways, for example, as 33071241025 + 42896208996 = 181855^2 + 207114^2 .

It is a cyclic number.

It is not a de Polignac number, because 75967450021 - 2¹ = 75967450019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75967450051) 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, 877636 + ... + 960301.

It is an arithmetic number, because the mean of its divisors is an integer number (18992332323).

Almost surely, 2^75967450021 is an apocalyptic number.

It is an amenable number.

75967450021 is a deficient number, since it is larger than the sum of its proper divisors (1879271).

75967450021 is a wasteful number, since it uses less digits than its factorization.

75967450021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879270.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 75967450021 in words is "seventy-five billion, nine hundred sixty-seven million, four hundred fifty thousand, twenty-one".