261534370137053 has 16 divisors (see below), whose sum is σ = 284810144806656. Its totient is φ = 238718043034560.

The previous prime is 261534370136989. The next prime is 261534370137101. The reversal of 261534370137053 is 350731073435162.

It is a cyclic number.

It is not a de Polignac number, because 261534370137053 - 2⁶ = 261534370136989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261534370136992 and 261534370137010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261531370137053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173017301 + ... + 174522362.

It is an arithmetic number, because the mean of its divisors is an integer number (17800634050416).

Almost surely, 2^{261534370137053} is an apocalyptic number.

It is an amenable number.

261534370137053 is a deficient number, since it is larger than the sum of its proper divisors (23275774669603).

261534370137053 is a wasteful number, since it uses less digits than its factorization.

261534370137053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347540324.

The product of its (nonzero) digits is 4762800, while the sum is 50.

The spelling of 261534370137053 in words is "two hundred sixty-one trillion, five hundred thirty-four billion, three hundred seventy million, one hundred thirty-seven thousand, fifty-three".