1655121045 has 16 divisors (see below), whose sum is σ = 2650927680. Its totient is φ = 881819904.

The previous prime is 1655121019. The next prime is 1655121053. The reversal of 1655121045 is 5401215561.

It is not a de Polignac number, because 1655121045 - 2¹² = 1655116949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41815 + ... + 71124.

It is an arithmetic number, because the mean of its divisors is an integer number (165682980).

Almost surely, 2^1655121045 is an apocalyptic number.

1655121045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1655121045 is a deficient number, since it is larger than the sum of its proper divisors (995806635).

1655121045 is a wasteful number, since it uses less digits than its factorization.

1655121045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113924.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 1655121045 is about 40683.1788949684. The cubic root of 1655121045 is about 1182.8869855766.

The spelling of 1655121045 in words is "one billion, six hundred fifty-five million, one hundred twenty-one thousand, forty-five".