1587444401957 has 16 divisors (see below), whose sum is σ = 1620185493888. Its totient is φ = 1554808432320.

The previous prime is 1587444401953. The next prime is 1587444401987. The reversal of 1587444401957 is 7591044447851.

It is a cyclic number.

It is not a de Polignac number, because 1587444401957 - 2² = 1587444401953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1587444401896 and 1587444401905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587444401951) 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, 114337538 + ... + 114351420.

It is an arithmetic number, because the mean of its divisors is an integer number (101261593368).

Almost surely, 2^{1587444401957} is an apocalyptic number.

It is an amenable number.

1587444401957 is a deficient number, since it is larger than the sum of its proper divisors (32741091931).

1587444401957 is a wasteful number, since it uses less digits than its factorization.

1587444401957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17500.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 1587444401957 in words is "one trillion, five hundred eighty-seven billion, four hundred forty-four million, four hundred one thousand, nine hundred fifty-seven".