2154377376520 has 64 divisors (see below), whose sum is σ = 4873757803200. Its totient is φ = 857061838080.

The previous prime is 2154377376499. The next prime is 2154377376521. The reversal of 2154377376520 is 256737734512.

It is a super-2 number, since 2×2154377376520² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2154377376521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11971447 + ... + 12150073.

It is an arithmetic number, because the mean of its divisors is an integer number (76152465675).

Almost surely, 2^{2154377376520} is an apocalyptic number.

2154377376520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154377376520 is an abundant number, since it is smaller than the sum of its proper divisors (2719380426680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154377376520 is a wasteful number, since it uses less digits than its factorization.

2154377376520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180278 (or 180274 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 52.

It can be divided in two parts, 215437 and 7376520, that added together give a palindrome (7591957).

The spelling of 2154377376520 in words is "two trillion, one hundred fifty-four billion, three hundred seventy-seven million, three hundred seventy-six thousand, five hundred twenty".