1089794939905 has 32 divisors (see below), whose sum is σ = 1502363351808. Its totient is φ = 743400806400.

The previous prime is 1089794939899. The next prime is 1089794939921. The reversal of 1089794939905 is 5099394979801.

It is not a de Polignac number, because 1089794939905 - 2¹⁷ = 1089794808833 is a prime.

It is a super-2 number, since 2×1089794939905² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7970770 + ... + 8106340.

It is an arithmetic number, because the mean of its divisors is an integer number (46948854744).

Almost surely, 2^{1089794939905} is an apocalyptic number.

It is an amenable number.

1089794939905 is a deficient number, since it is larger than the sum of its proper divisors (412568411903).

1089794939905 is a wasteful number, since it uses less digits than its factorization.

1089794939905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136777.

The product of its (nonzero) digits is 198404640, while the sum is 73.

The spelling of 1089794939905 in words is "one trillion, eighty-nine billion, seven hundred ninety-four million, nine hundred thirty-nine thousand, nine hundred five".