1146985551 has 12 divisors (see below), whose sum is σ = 1728790128. Its totient is φ = 731410944.

The previous prime is 1146985517. The next prime is 1146985571. The reversal of 1146985551 is 1555896411.

1146985551 is a `hidden beast` number, since 1 + 1 + 4 + 6 + 98 + 5 + 551 = 666.

It is not a de Polignac number, because 1146985551 - 2⁷ = 1146985423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1146985497 and 1146985506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1146985571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2770290 + ... + 2770703.

It is an arithmetic number, because the mean of its divisors is an integer number (144065844).

Almost surely, 2^1146985551 is an apocalyptic number.

1146985551 is a deficient number, since it is larger than the sum of its proper divisors (581804577).

1146985551 is a wasteful number, since it uses less digits than its factorization.

1146985551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541022 (or 5541019 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The square root of 1146985551 is about 33867.1751257763. The cubic root of 1146985551 is about 1046.7733299122.

It can be divided in two parts, 11469 and 85551, that added together give a triangular number (97020 = T₄₄₀).

The spelling of 1146985551 in words is "one billion, one hundred forty-six million, nine hundred eighty-five thousand, five hundred fifty-one".