1607121655 has 16 divisors (see below), whose sum is σ = 1945806624. Its totient is φ = 1274222080.

The previous prime is 1607121647. The next prime is 1607121671. The reversal of 1607121655 is 5561217061.

It is not a de Polignac number, because 1607121655 - 2³ = 1607121647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1607121655.

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, 519744 + ... + 522826.

It is an arithmetic number, because the mean of its divisors is an integer number (121612914).

Almost surely, 2^1607121655 is an apocalyptic number.

1607121655 is a deficient number, since it is larger than the sum of its proper divisors (338684969).

1607121655 is a wasteful number, since it uses less digits than its factorization.

1607121655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1607121655 is about 40088.9218488101. The cubic root of 1607121655 is about 1171.3398474380.

The spelling of 1607121655 in words is "one billion, six hundred seven million, one hundred twenty-one thousand, six hundred fifty-five".