1154553640 has 32 divisors (see below), whose sum is σ = 2750555880. Its totient is φ = 434655232.

The previous prime is 1154553607. The next prime is 1154553641. The reversal of 1154553640 is 463554511.

It can be written as a sum of positive squares in 4 ways, for example, as 1148803236 + 5750404 = 33894^2 + 2398^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1154553596 and 1154553605.

It is not an unprimeable number, because it can be changed into a prime (1154553641) 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, 848257 + ... + 849616.

Almost surely, 2^1154553640 is an apocalyptic number.

1154553640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154553640 is an abundant number, since it is smaller than the sum of its proper divisors (1596002240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1154553640 is a wasteful number, since it uses less digits than its factorization.

1154553640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697901 (or 1697897 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1154553640 is about 33978.7233427037. The cubic root of 1154553640 is about 1049.0705728566.

The spelling of 1154553640 in words is "one billion, one hundred fifty-four million, five hundred fifty-three thousand, six hundred forty".