2215437786780 has 48 divisors (see below), whose sum is σ = 6370880560800. Its totient is φ = 574816290048.

The previous prime is 2215437786733. The next prime is 2215437786853. The reversal of 2215437786780 is 876877345122.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 498970255 + ... + 498974694.

It is an arithmetic number, because the mean of its divisors is an integer number (132726678350).

Almost surely, 2^{2215437786780} is an apocalyptic number.

2215437786780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215437786780 is an abundant number, since it is smaller than the sum of its proper divisors (4155442774020).

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

2215437786780 is a wasteful number, since it uses less digits than its factorization.

2215437786780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997944998 (or 997944996 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 60.

The spelling of 2215437786780 in words is "two trillion, two hundred fifteen billion, four hundred thirty-seven million, seven hundred eighty-six thousand, seven hundred eighty".