261656303227451 has 8 divisors (see below), whose sum is σ = 285512371258800. Its totient is φ = 237811757091840.

The previous prime is 261656303227433. The next prime is 261656303227469. The reversal of 261656303227451 is 154722303656162.

It is an interprime number because it is at equal distance from previous prime (261656303227433) and next prime (261656303227469).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261656303227451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261656303227393 and 261656303227402.

It is not an unprimeable number, because it can be changed into a prime (261656303227411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2880426446 + ... + 2880517283.

It is an arithmetic number, because the mean of its divisors is an integer number (35689046407350).

Almost surely, 2^{261656303227451} is an apocalyptic number.

261656303227451 is a deficient number, since it is larger than the sum of its proper divisors (23856068031349).

261656303227451 is a wasteful number, since it uses less digits than its factorization.

261656303227451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5760947869.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 261656303227451 in words is "two hundred sixty-one trillion, six hundred fifty-six billion, three hundred three million, two hundred twenty-seven thousand, four hundred fifty-one".