1355751561 has 8 divisors (see below), whose sum is σ = 1808550720. Its totient is φ = 903393392.

The previous prime is 1355751557. The next prime is 1355751577. The reversal of 1355751561 is 1651575531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1355751561 - 2² = 1355751557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1355751361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103005 + ... + 115418.

It is an arithmetic number, because the mean of its divisors is an integer number (226068840).

Almost surely, 2^1355751561 is an apocalyptic number.

It is an amenable number.

1355751561 is a deficient number, since it is larger than the sum of its proper divisors (452799159).

1355751561 is a wasteful number, since it uses less digits than its factorization.

1355751561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220495.

The product of its digits is 78750, while the sum is 39.

The square root of 1355751561 is about 36820.5317859479. The cubic root of 1355751561 is about 1106.7767763842.

The spelling of 1355751561 in words is "one billion, three hundred fifty-five million, seven hundred fifty-one thousand, five hundred sixty-one".