261552377456106 has 64 divisors (see below), whose sum is σ = 592322631892992. Its totient is φ = 76277811240000.

The previous prime is 261552377456087. The next prime is 261552377456131. The reversal of 261552377456106 is 601654773255162.

It is a super-2 number, since 2×261552377456106² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261552377456106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352767690 + ... + 353508341.

It is an arithmetic number, because the mean of its divisors is an integer number (9255041123328).

Almost surely, 2^{261552377456106} is an apocalyptic number.

261552377456106 is an abundant number, since it is smaller than the sum of its proper divisors (330770254436886).

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

261552377456106 is a wasteful number, since it uses less digits than its factorization.

261552377456106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706276259.

The product of its (nonzero) digits is 63504000, while the sum is 60.

The spelling of 261552377456106 in words is "two hundred sixty-one trillion, five hundred fifty-two billion, three hundred seventy-seven million, four hundred fifty-six thousand, one hundred six".