15455250261 has 36 divisors (see below), whose sum is σ = 24874493644. Its totient is φ = 9238458240.

The previous prime is 15455250257. The next prime is 15455250271. The reversal of 15455250261 is 16205255451.

15455250261 is a `hidden beast` number, since 1 + 5 + 45 + 52 + 502 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5978227761 + 9477022500 = 77319^2 + 97350^2 .

It is not a de Polignac number, because 15455250261 - 2² = 15455250257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15455250271) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17710 + ... + 176703.

Almost surely, 2^15455250261 is an apocalyptic number.

15455250261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15455250261 is a deficient number, since it is larger than the sum of its proper divisors (9419243383).

15455250261 is a wasteful number, since it uses less digits than its factorization.

15455250261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194514 (or 194500 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 15455250261 in words is "fifteen billion, four hundred fifty-five million, two hundred fifty thousand, two hundred sixty-one".