2155619683074 has 64 divisors (see below), whose sum is σ = 5067790479360. Its totient is φ = 602632691520.

The previous prime is 2155619683073. The next prime is 2155619683109. The reversal of 2155619683074 is 4703869165512.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2155619683073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 830287 + ... + 2236205.

It is an arithmetic number, because the mean of its divisors is an integer number (79184226240).

It is a 1-persistent number, because it is pandigital, but 2⋅2155619683074 = 4311239366148 is not.

Almost surely, 2^{2155619683074} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155619683074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2533895239680).

2155619683074 is an abundant number, since it is smaller than the sum of its proper divisors (2912170796286).

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

2155619683074 is a wasteful number, since it uses less digits than its factorization.

2155619683074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407735.

The product of its (nonzero) digits is 10886400, while the sum is 57.

The spelling of 2155619683074 in words is "two trillion, one hundred fifty-five billion, six hundred nineteen million, six hundred eighty-three thousand, seventy-four".