13555504780 has 24 divisors (see below), whose sum is σ = 29964800880. Its totient is φ = 5136822720.

The previous prime is 13555504769. The next prime is 13555504811. The reversal of 13555504780 is 8740555531.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17835811 + ... + 17836570.

It is an arithmetic number, because the mean of its divisors is an integer number (1248533370).

Almost surely, 2^13555504780 is an apocalyptic number.

13555504780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13555504780 is an abundant number, since it is smaller than the sum of its proper divisors (16409296100).

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

13555504780 is a wasteful number, since it uses less digits than its factorization.

13555504780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35672409 (or 35672407 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 13555504780 in words is "thirteen billion, five hundred fifty-five million, five hundred four thousand, seven hundred eighty".