261563146514 has 16 divisors (see below), whose sum is σ = 433485727488. Its totient is φ = 117736863552.

The previous prime is 261563146511. The next prime is 261563146519. The reversal of 261563146514 is 415641365162.

It is a super-2 number, since 2×261563146514² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261563146511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167239082 + ... + 167240645.

It is an arithmetic number, because the mean of its divisors is an integer number (27092857968).

Almost surely, 2^261563146514 is an apocalyptic number.

261563146514 is a deficient number, since it is larger than the sum of its proper divisors (171922580974).

261563146514 is a wasteful number, since it uses less digits than its factorization.

261563146514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334479769.

The product of its digits is 518400, while the sum is 44.

The spelling of 261563146514 in words is "two hundred sixty-one billion, five hundred sixty-three million, one hundred forty-six thousand, five hundred fourteen".