1340551656 has 48 divisors (see below), whose sum is σ = 3634265700. Its totient is φ = 446406912.

The previous prime is 1340551637. The next prime is 1340551661. The reversal of 1340551656 is 6561550431.

1340551656 is a `hidden beast` number, since 1 + 3 + 40 + 551 + 65 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1255284900 + 85266756 = 35430^2 + 9234^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1340551656.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68260 + ... + 85676.

Almost surely, 2^1340551656 is an apocalyptic number.

It is an amenable number.

1340551656 is an abundant number, since it is smaller than the sum of its proper divisors (2293714044).

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

1340551656 is a wasteful number, since it uses less digits than its factorization.

1340551656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18498 (or 18491 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1340551656 is about 36613.5447068431. The cubic root of 1340551656 is about 1102.6250408104.

The spelling of 1340551656 in words is "one billion, three hundred forty million, five hundred fifty-one thousand, six hundred fifty-six".