261303478222000 has 40 divisors (see below), whose sum is σ = 631831810345632. Its totient is φ = 104521391288000.

The previous prime is 261303478221991. The next prime is 261303478222009. The reversal of 261303478222000 is 222874303162.

It is an interprime number because it is at equal distance from previous prime (261303478221991) and next prime (261303478222009).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (261303478222009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65325867556 + ... + 65325871555.

Almost surely, 2^{261303478222000} is an apocalyptic number.

261303478222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261303478222000 is an abundant number, since it is smaller than the sum of its proper divisors (370528332123632).

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

261303478222000 is a wasteful number, since it uses less digits than its factorization.

261303478222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130651739134 (or 130651739118 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 261303478222000 in words is "two hundred sixty-one trillion, three hundred three billion, four hundred seventy-eight million, two hundred twenty-two thousand".