1540666450 has 24 divisors (see below), whose sum is σ = 2873655360. Its totient is φ = 614542800.

The previous prime is 1540666399. The next prime is 1540666459. The reversal of 1540666450 is 546660451.

It is a super-2 number, since 2×1540666450² = 4747306220311205000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1540666459) 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, 24966 + ... + 60865.

It is an arithmetic number, because the mean of its divisors is an integer number (119735640).

Almost surely, 2^1540666450 is an apocalyptic number.

1540666450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540666450 is a deficient number, since it is larger than the sum of its proper divisors (1332988910).

1540666450 is a wasteful number, since it uses less digits than its factorization.

1540666450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86202 (or 86197 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 1540666450 is about 39251.3241814846. The cubic root of 1540666450 is about 1154.9669099670.

The spelling of 1540666450 in words is "one billion, five hundred forty million, six hundred sixty-six thousand, four hundred fifty".