1601621546987 has 8 divisors (see below), whose sum is σ = 1996826863872. Its totient is φ = 1248016789800.

The previous prime is 1601621546981. The next prime is 1601621547007. The reversal of 1601621546987 is 7896451261061.

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

It is not a de Polignac number, because 1601621546987 - 2⁸ = 1601621546731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601621546981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10400139839 + ... + 10400139992.

It is an arithmetic number, because the mean of its divisors is an integer number (249603357984).

Almost surely, 2^{1601621546987} is an apocalyptic number.

1601621546987 is a deficient number, since it is larger than the sum of its proper divisors (395205316885).

1601621546987 is a wasteful number, since it uses less digits than its factorization.

1601621546987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20800279849.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 1601621546987 in words is "one trillion, six hundred one billion, six hundred twenty-one million, five hundred forty-six thousand, nine hundred eighty-seven".