261311452315 has 16 divisors (see below), whose sum is σ = 324523298880. Its totient is φ = 201755532160.

The previous prime is 261311452301. The next prime is 261311452349. The reversal of 261311452315 is 513254113162.

It is not a de Polignac number, because 261311452315 - 2²⁵ = 261277897883 is a prime.

It is a super-2 number, since 2×261311452315² (a number of 24 digits) contains 22 as substring.

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, 33199 + ... + 723688.

It is an arithmetic number, because the mean of its divisors is an integer number (20282706180).

Almost surely, 2^261311452315 is an apocalyptic number.

261311452315 is a deficient number, since it is larger than the sum of its proper divisors (63211846565).

261311452315 is a wasteful number, since it uses less digits than its factorization.

261311452315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759302.

The product of its digits is 21600, while the sum is 34.

Adding to 261311452315 its reverse (513254113162), we get a palindrome (774565565477).

The spelling of 261311452315 in words is "two hundred sixty-one billion, three hundred eleven million, four hundred fifty-two thousand, three hundred fifteen".