1655387005 has 8 divisors (see below), whose sum is σ = 1993245912. Its totient is φ = 1319788608.

The previous prime is 1655386991. The next prime is 1655387021. The reversal of 1655387005 is 5007835561.

It can be written as a sum of positive squares in 4 ways, for example, as 663011001 + 992376004 = 25749^2 + 31502^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1655387005 - 2¹⁷ = 1655255933 is a prime.

It is a super-2 number, since 2×1655387005² = 5480612272645740050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563514 + ... + 566443.

It is an arithmetic number, because the mean of its divisors is an integer number (249155739).

Almost surely, 2^1655387005 is an apocalyptic number.

It is an amenable number.

1655387005 is a deficient number, since it is larger than the sum of its proper divisors (337858907).

1655387005 is a wasteful number, since it uses less digits than its factorization.

1655387005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130255.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 1655387005 is about 40686.4474364622. The cubic root of 1655387005 is about 1182.9503412194.

The spelling of 1655387005 in words is "one billion, six hundred fifty-five million, three hundred eighty-seven thousand, five".