75444314505157 has 16 divisors (see below), whose sum is σ = 81318850809840. Its totient is φ = 69579942681600.

The previous prime is 75444314505139. The next prime is 75444314505191. The reversal of 75444314505157 is 75150541344457.

It can be written as a sum of positive squares in 8 ways, for example, as 49148229636 + 75395166275521 = 221694^2 + 8683039^2 .

It is a de Polignac number, because none of the positive numbers 2^k-75444314505157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75444314505098 and 75444314505107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75444314505127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973172557 + ... + 973250077.

It is an arithmetic number, because the mean of its divisors is an integer number (5082428175615).

Almost surely, 2^{75444314505157} is an apocalyptic number.

It is an amenable number.

75444314505157 is a deficient number, since it is larger than the sum of its proper divisors (5874536304683).

75444314505157 is a wasteful number, since it uses less digits than its factorization.

75444314505157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142104.

The product of its (nonzero) digits is 23520000, while the sum is 55.

The spelling of 75444314505157 in words is "seventy-five trillion, four hundred forty-four billion, three hundred fourteen million, five hundred five thousand, one hundred fifty-seven".