274780161840 has 80 divisors (see below), whose sum is σ = 857535516000. Its totient is φ = 72782923776.

The previous prime is 274780161779. The next prime is 274780161841. The reversal of 274780161840 is 48161087472.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 274780161840.

It is not an unprimeable number, because it can be changed into a prime (274780161841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3806245 + ... + 3877764.

It is an arithmetic number, because the mean of its divisors is an integer number (10719193950).

Almost surely, 2^274780161840 is an apocalyptic number.

274780161840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

274780161840 is an abundant number, since it is smaller than the sum of its proper divisors (582755354160).

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

274780161840 is a wasteful number, since it uses less digits than its factorization.

274780161840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7684174 (or 7684168 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 274780161840 in words is "two hundred seventy-four billion, seven hundred eighty million, one hundred sixty-one thousand, eight hundred forty".