1655601406 has 8 divisors (see below), whose sum is σ = 2629484640. Its totient is φ = 779106528.

The previous prime is 1655601401. The next prime is 1655601421. The reversal of 1655601406 is 6041065561.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 48694159 = 1655601406 / (1 + 6 + 5 + 5 + 6 + 0 + 1 + 4 + 0 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655601401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24347046 + ... + 24347113.

It is an arithmetic number, because the mean of its divisors is an integer number (328685580).

Almost surely, 2^1655601406 is an apocalyptic number.

1655601406 is a deficient number, since it is larger than the sum of its proper divisors (973883234).

1655601406 is a wasteful number, since it uses less digits than its factorization.

1655601406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48694178.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1655601406 is about 40689.0821474262. The cubic root of 1655601406 is about 1183.0014097986.

Adding to 1655601406 its reverse (6041065561), we get a palindrome (7696666967).

The spelling of 1655601406 in words is "one billion, six hundred fifty-five million, six hundred one thousand, four hundred six".