1655381629 has 4 divisors (see below), whose sum is σ = 1805870880. Its totient is φ = 1504892380.

The previous prime is 1655381597. The next prime is 1655381633. The reversal of 1655381629 is 9261835561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1655381629 - 2⁵ = 1655381597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655381029) 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, 75244609 + ... + 75244630.

It is an arithmetic number, because the mean of its divisors is an integer number (451467720).

Almost surely, 2^1655381629 is an apocalyptic number.

It is an amenable number.

1655381629 is a deficient number, since it is larger than the sum of its proper divisors (150489251).

1655381629 is a wasteful number, since it uses less digits than its factorization.

1655381629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150489250.

The product of its digits is 388800, while the sum is 46.

The square root of 1655381629 is about 40686.3813701833. The cubic root of 1655381629 is about 1182.9490606431.

The spelling of 1655381629 in words is "one billion, six hundred fifty-five million, three hundred eighty-one thousand, six hundred twenty-nine".