19337887520661 has 64 divisors (see below), whose sum is σ = 29734340198400. Its totient is φ = 11096357723136.

The previous prime is 19337887520641. The next prime is 19337887520671. The reversal of 19337887520661 is 16602578873391.

It is not a de Polignac number, because 19337887520661 - 2⁴³ = 10541794498453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19337887520592 and 19337887520601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19337887520641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 145131276 + ... + 145264458.

It is an arithmetic number, because the mean of its divisors is an integer number (464599065600).

Almost surely, 2^{19337887520661} is an apocalyptic number.

It is an amenable number.

19337887520661 is a deficient number, since it is larger than the sum of its proper divisors (10396452677739).

19337887520661 is a wasteful number, since it uses less digits than its factorization.

19337887520661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138418.

The product of its (nonzero) digits is 91445760, while the sum is 66.

The spelling of 19337887520661 in words is "nineteen trillion, three hundred thirty-seven billion, eight hundred eighty-seven million, five hundred twenty thousand, six hundred sixty-one".