261250015151544 has 64 divisors (see below), whose sum is σ = 671594092244640. Its totient is φ = 84626531320320.

The previous prime is 261250015151497. The next prime is 261250015151557. The reversal of 261250015151544 is 445151510052162.

261250015151544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 261250015151496 and 261250015151505.

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, 178442979 + ... + 179901074.

Almost surely, 2^{261250015151544} is an apocalyptic number.

261250015151544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261250015151544 is an abundant number, since it is smaller than the sum of its proper divisors (410344077093096).

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

261250015151544 is a wasteful number, since it uses less digits than its factorization.

261250015151544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358344920 (or 358344916 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 261250015151544 in words is "two hundred sixty-one trillion, two hundred fifty billion, fifteen million, one hundred fifty-one thousand, five hundred forty-four".