505367778980 has 12 divisors (see below), whose sum is σ = 1061272335900. Its totient is φ = 202147111584.

The previous prime is 505367778961. The next prime is 505367779027. The reversal of 505367778980 is 89877763505.

It can be written as a sum of positive squares in 2 ways, for example, as 158123931904 + 347243847076 = 397648^2 + 589274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12634194455 + ... + 12634194494.

It is an arithmetic number, because the mean of its divisors is an integer number (88439361325).

Almost surely, 2^505367778980 is an apocalyptic number.

It is an amenable number.

505367778980 is an abundant number, since it is smaller than the sum of its proper divisors (555904556920).

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

505367778980 is a wasteful number, since it uses less digits than its factorization.

505367778980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25268388958 (or 25268388956 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 65.

The spelling of 505367778980 in words is "five hundred five billion, three hundred sixty-seven million, seven hundred seventy-eight thousand, nine hundred eighty".