1540645650 has 48 divisors (see below), whose sum is σ = 4245338400. Its totient is φ = 410838480.

The previous prime is 1540645573. The next prime is 1540645651. The reversal of 1540645650 is 565460451.

1540645650 is a `hidden beast` number, since 1 + 5 + 4 + 0 + 645 + 6 + 5 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (1540645651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 569260 + ... + 571959.

It is an arithmetic number, because the mean of its divisors is an integer number (88444550).

Almost surely, 2^1540645650 is an apocalyptic number.

1540645650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540645650 is an abundant number, since it is smaller than the sum of its proper divisors (2704692750).

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

1540645650 is a wasteful number, since it uses less digits than its factorization.

1540645650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141240 (or 1141229 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1540645650 is about 39251.0592213764. The cubic root of 1540645650 is about 1154.9617123419.

The spelling of 1540645650 in words is "one billion, five hundred forty million, six hundred forty-five thousand, six hundred fifty".