2661576303551 has 16 divisors (see below), whose sum is σ = 2930894523648. Its totient is φ = 2396820950400.

The previous prime is 2661576303539. The next prime is 2661576303571. The reversal of 2661576303551 is 1553036751662.

It is a cyclic number.

It is not a de Polignac number, because 2661576303551 - 2¹⁸ = 2661576041407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661576303551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661576303521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16992071 + ... + 17147991.

It is an arithmetic number, because the mean of its divisors is an integer number (183180907728).

Almost surely, 2^{2661576303551} is an apocalyptic number.

2661576303551 is a deficient number, since it is larger than the sum of its proper divisors (269318220097).

2661576303551 is a wasteful number, since it uses less digits than its factorization.

2661576303551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170542.

The product of its (nonzero) digits is 3402000, while the sum is 50.

The spelling of 2661576303551 in words is "two trillion, six hundred sixty-one billion, five hundred seventy-six million, three hundred three thousand, five hundred fifty-one".