1177545745561 has 32 divisors (see below), whose sum is σ = 1268851737600. Its totient is φ = 1090323037440.

The previous prime is 1177545745547. The next prime is 1177545745573. The reversal of 1177545745561 is 1655475457711.

It is a cyclic number.

It is not a de Polignac number, because 1177545745561 - 2¹¹ = 1177545743513 is a prime.

It is a super-2 number, since 2×1177545745561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1177545745496 and 1177545745505.

It is not an unprimeable number, because it can be changed into a prime (1177545745531) 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, 53482191 + ... + 53504203.

It is an arithmetic number, because the mean of its divisors is an integer number (39651616800).

Almost surely, 2^{1177545745561} is an apocalyptic number.

It is an amenable number.

1177545745561 is a deficient number, since it is larger than the sum of its proper divisors (91305992039).

1177545745561 is a wasteful number, since it uses less digits than its factorization.

1177545745561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22609.

The product of its digits is 20580000, while the sum is 58.

The spelling of 1177545745561 in words is "one trillion, one hundred seventy-seven billion, five hundred forty-five million, seven hundred forty-five thousand, five hundred sixty-one".