655635540 has 48 divisors (see below), whose sum is σ = 2098035072. Its totient is φ = 149859456.

The previous prime is 655635529. The next prime is 655635559. The reversal of 655635540 is 45536556.

It is a super-2 number, since 2×655635540² = 859715922622183200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780099 + ... + 780938.

It is an arithmetic number, because the mean of its divisors is an integer number (43709064).

Almost surely, 2^655635540 is an apocalyptic number.

655635540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

655635540 is an abundant number, since it is smaller than the sum of its proper divisors (1442399532).

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

655635540 is a wasteful number, since it uses less digits than its factorization.

655635540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561056 (or 1561054 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 39.

The square root of 655635540 is about 25605.3810750787. The cubic root of 655635540 is about 868.7353537548.

The spelling of 655635540 in words is "six hundred fifty-five million, six hundred thirty-five thousand, five hundred forty".