911457557561 has 8 divisors (see below), whose sum is σ = 927607740000. Its totient is φ = 895330766880.

The previous prime is 911457557551. The next prime is 911457557597. The reversal of 911457557561 is 165755754119.

911457557561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-911457557561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 911457557497 and 911457557506.

It is not an unprimeable number, because it can be changed into a prime (911457557551) 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, 5769311 + ... + 5925188.

It is an arithmetic number, because the mean of its divisors is an integer number (115950967500).

Almost surely, 2^911457557561 is an apocalyptic number.

It is an amenable number.

911457557561 is a deficient number, since it is larger than the sum of its proper divisors (16150182439).

911457557561 is a wasteful number, since it uses less digits than its factorization.

911457557561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11695879.

The product of its digits is 6615000, while the sum is 56.

The spelling of 911457557561 in words is "nine hundred eleven billion, four hundred fifty-seven million, five hundred fifty-seven thousand, five hundred sixty-one".