1655001617 has 2 divisors, whose sum is σ = 1655001618. Its totient is φ = 1655001616.

The previous prime is 1655001589. The next prime is 1655001637. The reversal of 1655001617 is 7161005561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1322340496 + 332661121 = 36364^2 + 18239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655001617 - 2¹² = 1654997521 is a prime.

It is a super-2 number, since 2×1655001617² = 5478060704545229378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1655001637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827500808 + 827500809.

It is an arithmetic number, because the mean of its divisors is an integer number (827500809).

Almost surely, 2^1655001617 is an apocalyptic number.

It is an amenable number.

1655001617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655001617 is an equidigital number, since it uses as much as digits as its factorization.

1655001617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 1655001617 is about 40681.7110874162. The cubic root of 1655001617 is about 1182.8585338358.

The spelling of 1655001617 in words is "one billion, six hundred fifty-five million, one thousand, six hundred seventeen".