1203664545 has 24 divisors (see below), whose sum is σ = 2087834112. Its totient is φ = 641498400.

The previous prime is 1203664541. The next prime is 1203664591. The reversal of 1203664545 is 5454663021.

1203664545 is a `hidden beast` number, since 1 + 2 + 0 + 3 + 6 + 645 + 4 + 5 = 666.

It is not a de Polignac number, because 1203664545 - 2² = 1203664541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1203664541) 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, 60160 + ... + 77630.

It is an arithmetic number, because the mean of its divisors is an integer number (86993088).

Almost surely, 2^1203664545 is an apocalyptic number.

1203664545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1203664545 is a deficient number, since it is larger than the sum of its proper divisors (884169567).

1203664545 is a wasteful number, since it uses less digits than its factorization.

1203664545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19013 (or 19010 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1203664545 is about 34693.8689828621. The cubic root of 1203664545 is about 1063.7391810933.

The spelling of 1203664545 in words is "one billion, two hundred three million, six hundred sixty-four thousand, five hundred forty-five".