261424155006 has 24 divisors (see below), whose sum is σ = 647336003184. Its totient is φ = 74692615680.

The previous prime is 261424154989. The next prime is 261424155017. The reversal of 261424155006 is 600551424162.

261424155006 is a `hidden beast` number, since 2 + 6 + 142 + 4 + 1 + 5 + 500 + 6 = 666.

It is a super-2 number, since 2×261424155006² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

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, 1037397315 + ... + 1037397566.

It is an arithmetic number, because the mean of its divisors is an integer number (26972333466).

Almost surely, 2^261424155006 is an apocalyptic number.

261424155006 is an abundant number, since it is smaller than the sum of its proper divisors (385911848178).

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

261424155006 is a wasteful number, since it uses less digits than its factorization.

261424155006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074794896 (or 2074794893 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 261424155006 its reverse (600551424162), we get a palindrome (861975579168).

The spelling of 261424155006 in words is "two hundred sixty-one billion, four hundred twenty-four million, one hundred fifty-five thousand, six".