261533575566122 has 32 divisors (see below), whose sum is σ = 410076911623680. Its totient is φ = 124861351134960.

The previous prime is 261533575566077. The next prime is 261533575566199. The reversal of 261533575566122 is 221665575335162.

It is a super-2 number, since 2×261533575566122² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144952529 + ... + 146745707.

It is an arithmetic number, because the mean of its divisors is an integer number (12814903488240).

Almost surely, 2^{261533575566122} is an apocalyptic number.

261533575566122 is a deficient number, since it is larger than the sum of its proper divisors (148543336057558).

261533575566122 is a wasteful number, since it uses less digits than its factorization.

261533575566122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798778.

The product of its digits is 68040000, while the sum is 59.

The spelling of 261533575566122 in words is "two hundred sixty-one trillion, five hundred thirty-three billion, five hundred seventy-five million, five hundred sixty-six thousand, one hundred twenty-two".