1140445551 has 12 divisors (see below), whose sum is σ = 1768854552. Its totient is φ = 651683088.

The previous prime is 1140445519. The next prime is 1140445567. The reversal of 1140445551 is 1555440411.

It is not a de Polignac number, because 1140445551 - 2⁵ = 1140445519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140445571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3878920 + ... + 3879213.

It is an arithmetic number, because the mean of its divisors is an integer number (147404546).

Almost surely, 2^1140445551 is an apocalyptic number.

1140445551 is a deficient number, since it is larger than the sum of its proper divisors (628409001).

1140445551 is an equidigital number, since it uses as much as digits as its factorization.

1140445551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7758150 (or 7758143 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 1140445551 is about 33770.4834285801. The cubic root of 1140445551 is about 1044.7800032909.

Adding to 1140445551 its reverse (1555440411), we get a palindrome (2695885962).

The spelling of 1140445551 in words is "one billion, one hundred forty million, four hundred forty-five thousand, five hundred fifty-one".