2781825311980 has 48 divisors (see below), whose sum is σ = 6863132664864. Its totient is φ = 933759544320.

The previous prime is 2781825311977. The next prime is 2781825311983. The reversal of 2781825311980 is 891135281872.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2781825311977) and next prime (2781825311983).

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (2781825311983) 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, 486330237 + ... + 486335956.

It is an arithmetic number, because the mean of its divisors is an integer number (142981930518).

Almost surely, 2^{2781825311980} is an apocalyptic number.

2781825311980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2781825311980 is an abundant number, since it is smaller than the sum of its proper divisors (4081307352884).

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

2781825311980 is a wasteful number, since it uses less digits than its factorization.

2781825311980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972666226 (or 972666224 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 2781825311980 in words is "two trillion, seven hundred eighty-one billion, eight hundred twenty-five million, three hundred eleven thousand, nine hundred eighty".