261544612453070 has 64 divisors (see below), whose sum is σ = 474084209387520. Its totient is φ = 103885409647488.

The previous prime is 261544612453063. The next prime is 261544612453087. The reversal of 261544612453070 is 70354216445162.

It is a super-3 number, since 3×261544612453070³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3795032252 + ... + 3795101168.

It is an arithmetic number, because the mean of its divisors is an integer number (7407565771680).

Almost surely, 2^{261544612453070} is an apocalyptic number.

261544612453070 is a deficient number, since it is larger than the sum of its proper divisors (212539596934450).

261544612453070 is a wasteful number, since it uses less digits than its factorization.

261544612453070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72089.

The product of its (nonzero) digits is 4838400, while the sum is 50.

The spelling of 261544612453070 in words is "two hundred sixty-one trillion, five hundred forty-four billion, six hundred twelve million, four hundred fifty-three thousand, seventy".