261552445265512 has 32 divisors (see below), whose sum is σ = 503912198707200. Its totient is φ = 127179325848384.

The previous prime is 261552445265471. The next prime is 261552445265569. The reversal of 261552445265512 is 215562544255162.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

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, 216076968 + ... + 217284055.

It is an arithmetic number, because the mean of its divisors is an integer number (15747256209600).

Almost surely, 2^{261552445265512} is an apocalyptic number.

It is an amenable number.

261552445265512 is a deficient number, since it is larger than the sum of its proper divisors (242359753441688).

261552445265512 is a wasteful number, since it uses less digits than its factorization.

261552445265512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433363105 (or 433363101 counting only the distinct ones).

The product of its digits is 28800000, while the sum is 55.

The spelling of 261552445265512 in words is "two hundred sixty-one trillion, five hundred fifty-two billion, four hundred forty-five million, two hundred sixty-five thousand, five hundred twelve".