1655661201501 has 16 divisors (see below), whose sum is σ = 2296428580800. Its totient is φ = 1059759243648.

The previous prime is 1655661201487. The next prime is 1655661201529. The reversal of 1655661201501 is 1051021665561.

It is not a de Polignac number, because 1655661201501 - 2¹³ = 1655661193309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1655661201501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655661201101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53142496 + ... + 53173641.

It is an arithmetic number, because the mean of its divisors is an integer number (143526786300).

Almost surely, 2^{1655661201501} is an apocalyptic number.

It is an amenable number.

1655661201501 is a deficient number, since it is larger than the sum of its proper divisors (640767379299).

1655661201501 is a wasteful number, since it uses less digits than its factorization.

1655661201501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106316348.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 1655661201501 in words is "one trillion, six hundred fifty-five billion, six hundred sixty-one million, two hundred one thousand, five hundred one".