1655206553 has 24 divisors (see below), whose sum is σ = 2239226304. Its totient is φ = 1190550240.

The previous prime is 1655206541. The next prime is 1655206561. The reversal of 1655206553 is 3556025561.

It is not a de Polignac number, because 1655206553 - 2⁴ = 1655206537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1655206153) 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, 64151 + ... + 86172.

It is an arithmetic number, because the mean of its divisors is an integer number (93301096).

Almost surely, 2^1655206553 is an apocalyptic number.

1655206553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1655206553 is a deficient number, since it is larger than the sum of its proper divisors (584019751).

1655206553 is a wasteful number, since it uses less digits than its factorization.

1655206553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150365 (or 150354 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 1655206553 is about 40684.2297825583. The cubic root of 1655206553 is about 1182.9073555990.

The spelling of 1655206553 in words is "one billion, six hundred fifty-five million, two hundred six thousand, five hundred fifty-three".