1655153749 has 4 divisors (see below), whose sum is σ = 1655607564. Its totient is φ = 1654699936.

The previous prime is 1655153719. The next prime is 1655153831. The reversal of 1655153749 is 9473515561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 627502500 + 1027651249 = 25050^2 + 32057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655153749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1655153699 and 1655153708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655153719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221392 + ... + 228745.

It is an arithmetic number, because the mean of its divisors is an integer number (413901891).

Almost surely, 2^1655153749 is an apocalyptic number.

It is an amenable number.

1655153749 is a deficient number, since it is larger than the sum of its proper divisors (453815).

1655153749 is an equidigital number, since it uses as much as digits as its factorization.

1655153749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453814.

The product of its digits is 567000, while the sum is 46.

The square root of 1655153749 is about 40683.5808281425. The cubic root of 1655153749 is about 1182.8947765236.

The spelling of 1655153749 in words is "one billion, six hundred fifty-five million, one hundred fifty-three thousand, seven hundred forty-nine".