261429087610 has 32 divisors (see below), whose sum is σ = 503008434432. Its totient is φ = 97585403520.

The previous prime is 261429087593. The next prime is 261429087643. The reversal of 261429087610 is 16780924162.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13852134 + ... + 13870993.

It is an arithmetic number, because the mean of its divisors is an integer number (15719013576).

Almost surely, 2^261429087610 is an apocalyptic number.

261429087610 is a deficient number, since it is larger than the sum of its proper divisors (241579346822).

261429087610 is a wasteful number, since it uses less digits than its factorization.

261429087610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27723198.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 261429087610 in words is "two hundred sixty-one billion, four hundred twenty-nine million, eighty-seven thousand, six hundred ten".