75437393849 has 4 divisors (see below), whose sum is σ = 75468920436. Its totient is φ = 75405867264.

The previous prime is 75437393833. The next prime is 75437393881. The reversal of 75437393849 is 94839373457.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94839373457 = 45343 ⋅2091599.

It can be written as a sum of positive squares in 2 ways, for example, as 39505537600 + 35931856249 = 198760^2 + 189557^2 .

It is a cyclic number.

It is not a de Polignac number, because 75437393849 - 2⁴ = 75437393833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75437393791 and 75437393800.

It is not an unprimeable number, because it can be changed into a prime (75437393149) 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, 15759704 + ... + 15764489.

It is an arithmetic number, because the mean of its divisors is an integer number (18867230109).

Almost surely, 2^75437393849 is an apocalyptic number.

It is an amenable number.

75437393849 is a deficient number, since it is larger than the sum of its proper divisors (31526587).

75437393849 is a wasteful number, since it uses less digits than its factorization.

75437393849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31526586.

The product of its digits is 68584320, while the sum is 62.

The spelling of 75437393849 in words is "seventy-five billion, four hundred thirty-seven million, three hundred ninety-three thousand, eight hundred forty-nine".