1655140949 has 16 divisors (see below), whose sum is σ = 2082848256. Its totient is φ = 1277660400.

The previous prime is 1655140919. The next prime is 1655140951. The reversal of 1655140949 is 9490415561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655140949 is a prime.

It is a super-2 number, since 2×1655140949² = 5478983122113241202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655140919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92207 + ... + 108684.

It is an arithmetic number, because the mean of its divisors is an integer number (130178016).

Almost surely, 2^1655140949 is an apocalyptic number.

It is an amenable number.

1655140949 is a deficient number, since it is larger than the sum of its proper divisors (427707307).

1655140949 is a wasteful number, since it uses less digits than its factorization.

1655140949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201016.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1655140949 is about 40683.4235162185. The cubic root of 1655140949 is about 1182.8917272415.

The spelling of 1655140949 in words is "one billion, six hundred fifty-five million, one hundred forty thousand, nine hundred forty-nine".