261534403147552 has 48 divisors (see below), whose sum is σ = 514997615164032. Its totient is φ = 130741360565760.

The previous prime is 261534403147543. The next prime is 261534403147573. The reversal of 261534403147552 is 255741304435162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 261534403147552.

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, 5163842293 + ... + 5163892939.

It is an arithmetic number, because the mean of its divisors is an integer number (10729116982584).

Almost surely, 2^{261534403147552} is an apocalyptic number.

It is an amenable number.

261534403147552 is a deficient number, since it is larger than the sum of its proper divisors (253463212016480).

261534403147552 is a wasteful number, since it uses less digits than its factorization.

261534403147552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79361 (or 79353 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 261534403147552 in words is "two hundred sixty-one trillion, five hundred thirty-four billion, four hundred three million, one hundred forty-seven thousand, five hundred fifty-two".