261554545455162 has 32 divisors (see below), whose sum is σ = 529738086958080. Its totient is φ = 86080046485680.

The previous prime is 261554545455089. The next prime is 261554545455221.

It is a happy number.

261554545455162 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 261554545455096 and 261554545455105.

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, 30634737 + ... + 38230827.

It is an arithmetic number, because the mean of its divisors is an integer number (16554315217440).

Almost surely, 2^{261554545455162} is an apocalyptic number.

261554545455162 is an abundant number, since it is smaller than the sum of its proper divisors (268183541502918).

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

261554545455162 is a wasteful number, since it uses less digits than its factorization.

261554545455162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668818.

The product of its digits is 144000000, while the sum is 60.

The spelling of 261554545455162 in words is "two hundred sixty-one trillion, five hundred fifty-four billion, five hundred forty-five million, four hundred fifty-five thousand, one hundred sixty-two".