1085661554 has 8 divisors (see below), whose sum is σ = 1663141248. Its totient is φ = 531281140.

The previous prime is 1085661553. The next prime is 1085661557. The reversal of 1085661554 is 4551665801.

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

It is a super-2 number, since 2×1085661554² = 2357322019667389832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1085661553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5774702 + ... + 5774889.

It is an arithmetic number, because the mean of its divisors is an integer number (207892656).

Almost surely, 2^1085661554 is an apocalyptic number.

1085661554 is a deficient number, since it is larger than the sum of its proper divisors (577479694).

1085661554 is a wasteful number, since it uses less digits than its factorization.

1085661554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11549640.

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 1085661554 is about 32949.3786587851. The cubic root of 1085661554 is about 1027.7752445858.

The spelling of 1085661554 in words is "one billion, eighty-five million, six hundred sixty-one thousand, five hundred fifty-four".