75061515157 has 4 divisors (see below), whose sum is σ = 75234867820. Its totient is φ = 74888162496.

The previous prime is 75061515149. The next prime is 75061515181. The reversal of 75061515157 is 75151516057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75151516057 = 701 ⋅107206157.

It can be written as a sum of positive squares in 2 ways, for example, as 35281611556 + 39779903601 = 187834^2 + 199449^2 .

It is a cyclic number.

It is not a de Polignac number, because 75061515157 - 2³ = 75061515149 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 (75061515457) 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, 86675682 + ... + 86676547.

It is an arithmetic number, because the mean of its divisors is an integer number (18808716955).

Almost surely, 2^75061515157 is an apocalyptic number.

It is an amenable number.

75061515157 is a deficient number, since it is larger than the sum of its proper divisors (173352663).

75061515157 is a wasteful number, since it uses less digits than its factorization.

75061515157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173352662.

The product of its (nonzero) digits is 183750, while the sum is 43.

The spelling of 75061515157 in words is "seventy-five billion, sixty-one million, five hundred fifteen thousand, one hundred fifty-seven".