1597551266605 has 16 divisors (see below), whose sum is σ = 2203591780224. Its totient is φ = 1089131561280.

The previous prime is 1597551266567. The next prime is 1597551266621. The reversal of 1597551266605 is 5066621557951.

It is not a de Polignac number, because 1597551266605 - 2⁷ = 1597551266477 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 1597551266605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131913951 + ... + 131926060.

It is an arithmetic number, because the mean of its divisors is an integer number (137724486264).

Almost surely, 2^{1597551266605} is an apocalyptic number.

It is an amenable number.

1597551266605 is a deficient number, since it is larger than the sum of its proper divisors (606040513619).

1597551266605 is a wasteful number, since it uses less digits than its factorization.

1597551266605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263840196.

The product of its (nonzero) digits is 17010000, while the sum is 58.

The spelling of 1597551266605 in words is "one trillion, five hundred ninety-seven billion, five hundred fifty-one million, two hundred sixty-six thousand, six hundred five".