261006615479 has 2 divisors, whose sum is σ = 261006615480. Its totient is φ = 261006615478.

The previous prime is 261006615437. The next prime is 261006615481. The reversal of 261006615479 is 974516600162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261006615479 - 2³² = 256711648183 is a prime.

Together with 261006615481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261006615379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130503307739 + 130503307740.

It is an arithmetic number, because the mean of its divisors is an integer number (130503307740).

Almost surely, 2^261006615479 is an apocalyptic number.

261006615479 is a deficient number, since it is larger than the sum of its proper divisors (1).

261006615479 is an equidigital number, since it uses as much as digits as its factorization.

261006615479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 261006615479 in words is "two hundred sixty-one billion, six million, six hundred fifteen thousand, four hundred seventy-nine".