75445525437077 has 4 divisors (see below), whose sum is σ = 75445776810060. Its totient is φ = 75445274064096.

The previous prime is 75445525437013. The next prime is 75445525437103. The reversal of 75445525437077 is 77073452554457.

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 39133644864721 + 36311880572356 = 6255689^2 + 6025934^2 .

It is a cyclic number.

It is not a de Polignac number, because 75445525437077 - 2⁶ = 75445525437013 is a prime.

It is a super-3 number, since 3×75445525437077³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75445525434077) 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, 125235752 + ... + 125836737.

It is an arithmetic number, because the mean of its divisors is an integer number (18861444202515).

Almost surely, 2^{75445525437077} is an apocalyptic number.

It is an amenable number.

75445525437077 is a deficient number, since it is larger than the sum of its proper divisors (251372983).

75445525437077 is a wasteful number, since it uses less digits than its factorization.

75445525437077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251372982.

The product of its (nonzero) digits is 576240000, while the sum is 65.

The spelling of 75445525437077 in words is "seventy-five trillion, four hundred forty-five billion, five hundred twenty-five million, four hundred thirty-seven thousand, seventy-seven".