1253553660 has 72 divisors (see below), whose sum is σ = 3864815136. Its totient is φ = 328798080.

The previous prime is 1253553649. The next prime is 1253553677. The reversal of 1253553660 is 663553521.

1253553660 is a `hidden beast` number, since 12 + 53 + 5 + 536 + 60 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46104 + ... + 68063.

It is an arithmetic number, because the mean of its divisors is an integer number (53677988).

Almost surely, 2^1253553660 is an apocalyptic number.

1253553660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253553660 is an abundant number, since it is smaller than the sum of its proper divisors (2611261476).

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

1253553660 is a wasteful number, since it uses less digits than its factorization.

1253553660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114243 (or 114238 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 1253553660 is about 35405.5597329007. The cubic root of 1253553660 is about 1078.2371962885.

The spelling of 1253553660 in words is "one billion, two hundred fifty-three million, five hundred fifty-three thousand, six hundred sixty".