2154377376517 has 4 divisors (see below), whose sum is σ = 2154382618240. Its totient is φ = 2154372134796.

The previous prime is 2154377376499. The next prime is 2154377376521. The reversal of 2154377376517 is 7156737734512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2154377376517 - 2²³ = 2154368987909 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 (2154377376587) 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, 1946517 + ... + 2845642.

It is an arithmetic number, because the mean of its divisors is an integer number (538595654560).

Almost surely, 2^{2154377376517} is an apocalyptic number.

It is an amenable number.

2154377376517 is a deficient number, since it is larger than the sum of its proper divisors (5241723).

2154377376517 is an equidigital number, since it uses as much as digits as its factorization.

2154377376517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241722.

The product of its digits is 25930800, while the sum is 58.

The spelling of 2154377376517 in words is "two trillion, one hundred fifty-four billion, three hundred seventy-seven million, three hundred seventy-six thousand, five hundred seventeen".