75551215557 has 12 divisors (see below), whose sum is σ = 105305162144. Its totient is φ = 48177585720.

The previous prime is 75551215489. The next prime is 75551215583.

75551215557 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 75551215557 - 2¹⁰ = 75551214533 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 (75551215757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23801569 + ... + 23804742.

Almost surely, 2^75551215557 is an apocalyptic number.

It is an amenable number.

75551215557 is a deficient number, since it is larger than the sum of its proper divisors (29753946587).

75551215557 is a wasteful number, since it uses less digits than its factorization.

75551215557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47606360 (or 47606337 counting only the distinct ones).

The product of its digits is 1531250, while the sum is 48.

The spelling of 75551215557 in words is "seventy-five billion, five hundred fifty-one million, two hundred fifteen thousand, five hundred fifty-seven".