261124046646 has 24 divisors (see below), whose sum is σ = 554775659880. Its totient is φ = 81921268992.

The previous prime is 261124046609. The next prime is 261124046741. The reversal of 261124046646 is 646640421162.

It is a junction number, because it is equal to n+sod(n) for n = 261124046598 and 261124046607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75293551 + ... + 75297018.

It is an arithmetic number, because the mean of its divisors is an integer number (23115652495).

Almost surely, 2^261124046646 is an apocalyptic number.

261124046646 is an abundant number, since it is smaller than the sum of its proper divisors (293651613234).

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

261124046646 is a wasteful number, since it uses less digits than its factorization.

261124046646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150590608 (or 150590591 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 261124046646 in words is "two hundred sixty-one billion, one hundred twenty-four million, forty-six thousand, six hundred forty-six".