2115758558377 has 4 divisors (see below), whose sum is σ = 2115814196740. Its totient is φ = 2115702920016.

The previous prime is 2115758558363. The next prime is 2115758558383. The reversal of 2115758558377 is 7738558575112.

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 1306291270761 + 809467287616 = 1142931^2 + 899704^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115758558377 - 2²³ = 2115750169769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115758558327) 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, 27762102 + ... + 27838207.

It is an arithmetic number, because the mean of its divisors is an integer number (528953549185).

Almost surely, 2^{2115758558377} is an apocalyptic number.

It is an amenable number.

2115758558377 is a deficient number, since it is larger than the sum of its proper divisors (55638363).

2115758558377 is an equidigital number, since it uses as much as digits as its factorization.

2115758558377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55638362.

The product of its digits is 82320000, while the sum is 64.

The spelling of 2115758558377 in words is "two trillion, one hundred fifteen billion, seven hundred fifty-eight million, five hundred fifty-eight thousand, three hundred seventy-seven".