261131024702000 has 160 divisors (see below), whose sum is σ = 652588828070400. Its totient is φ = 100958009856000.

The previous prime is 261131024701999. The next prime is 261131024702003. The reversal of 261131024702000 is 207420131162.

It is not an unprimeable number, because it can be changed into a prime (261131024702003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47554916 + ... + 52761084.

It is an arithmetic number, because the mean of its divisors is an integer number (4078680175440).

Almost surely, 2^{261131024702000} is an apocalyptic number.

261131024702000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261131024702000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326294414035200).

261131024702000 is an abundant number, since it is smaller than the sum of its proper divisors (391457803368400).

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

261131024702000 is a wasteful number, since it uses less digits than its factorization.

261131024702000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207032 (or 5207016 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 261131024702000 its reverse (207420131162), we get a palindrome (261338444833162).

The spelling of 261131024702000 in words is "two hundred sixty-one trillion, one hundred thirty-one billion, twenty-four million, seven hundred two thousand".