505455723780 has 96 divisors (see below), whose sum is σ = 1617554002176. Its totient is φ = 115525902336.

The previous prime is 505455723779. The next prime is 505455723781. The reversal of 505455723780 is 87327554505.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (505455723779) and next prime (505455723781).

It is not an unprimeable number, because it can be changed into a prime (505455723781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11577352 + ... + 11620928.

It is an arithmetic number, because the mean of its divisors is an integer number (16849520856).

Almost surely, 2^505455723780 is an apocalyptic number.

It is an amenable number.

505455723780 is an abundant number, since it is smaller than the sum of its proper divisors (1112098278396).

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

505455723780 is a wasteful number, since it uses less digits than its factorization.

505455723780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71213 (or 71211 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 51.

The spelling of 505455723780 in words is "five hundred five billion, four hundred fifty-five million, seven hundred twenty-three thousand, seven hundred eighty".