261148667061630 has 32 divisors (see below), whose sum is σ = 642043552193568. Its totient is φ = 67941116633600.

The previous prime is 261148667061613. The next prime is 261148667061677. The reversal of 261148667061630 is 36160766841162.

It is a congruent number.

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, 106157993511 + ... + 106157995970.

It is an arithmetic number, because the mean of its divisors is an integer number (20063861006049).

Almost surely, 2^{261148667061630} is an apocalyptic number.

261148667061630 is an abundant number, since it is smaller than the sum of its proper divisors (380894885131938).

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

261148667061630 is a wasteful number, since it uses less digits than its factorization.

261148667061630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212315989532.

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 261148667061630 in words is "two hundred sixty-one trillion, one hundred forty-eight billion, six hundred sixty-seven million, sixty-one thousand, six hundred thirty".