2261347891780 has 48 divisors (see below), whose sum is σ = 4777797104640. Its totient is φ = 899022927488.

The previous prime is 2261347891763. The next prime is 2261347891823. The reversal of 2261347891780 is 871987431622.

It is a super-2 number, since 2×2261347891780² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34914066 + ... + 34978774.

It is an arithmetic number, because the mean of its divisors is an integer number (99537439680).

Almost surely, 2^{2261347891780} is an apocalyptic number.

2261347891780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2261347891780 is an abundant number, since it is smaller than the sum of its proper divisors (2516449212860).

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

2261347891780 is a wasteful number, since it uses less digits than its factorization.

2261347891780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75348 (or 75346 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 2261347891780 in words is "two trillion, two hundred sixty-one billion, three hundred forty-seven million, eight hundred ninety-one thousand, seven hundred eighty".