275720557052661 has 32 divisors (see below), whose sum is σ = 434656309401600. Its totient is φ = 152113665009600.

The previous prime is 275720557052659. The next prime is 275720557052669. The reversal of 275720557052661 is 166250755027572.

It is not a de Polignac number, because 275720557052661 - 2¹ = 275720557052659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 275720557052595 and 275720557052604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275720557052669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369265 + ... + 23485686.

It is an arithmetic number, because the mean of its divisors is an integer number (13583009668800).

Almost surely, 2^{275720557052661} is an apocalyptic number.

275720557052661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

275720557052661 is a deficient number, since it is larger than the sum of its proper divisors (158935752348939).

275720557052661 is a wasteful number, since it uses less digits than its factorization.

275720557052661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23873969.

The product of its (nonzero) digits is 61740000, while the sum is 60.

The spelling of 275720557052661 in words is "two hundred seventy-five trillion, seven hundred twenty billion, five hundred fifty-seven million, fifty-two thousand, six hundred sixty-one".