75705121300157 has 4 divisors (see below), whose sum is σ = 80158363729596. Its totient is φ = 71251878870720.

The previous prime is 75705121300099. The next prime is 75705121300183. The reversal of 75705121300157 is 75100312150757.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38416927063321 + 37288194236836 = 6198139^2 + 6106406^2 .

It is a cyclic number.

It is not a de Polignac number, because 75705121300157 - 2¹⁸ = 75705121038013 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 (75705121300657) 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, 2226621214694 + ... + 2226621214727.

It is an arithmetic number, because the mean of its divisors is an integer number (20039590932399).

Almost surely, 2^{75705121300157} is an apocalyptic number.

It is an amenable number.

75705121300157 is a deficient number, since it is larger than the sum of its proper divisors (4453242429439).

75705121300157 is a wasteful number, since it uses less digits than its factorization.

75705121300157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453242429438.

The product of its (nonzero) digits is 257250, while the sum is 44.

The spelling of 75705121300157 in words is "seventy-five trillion, seven hundred five billion, one hundred twenty-one million, three hundred thousand, one hundred fifty-seven".