1664038750415 has 16 divisors (see below), whose sum is σ = 2034579498048. Its totient is φ = 1306077067776.

The previous prime is 1664038750391. The next prime is 1664038750417. The reversal of 1664038750415 is 5140578304661.

It is a cyclic number.

It is not a de Polignac number, because 1664038750415 - 2⁶ = 1664038750351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664038750417) 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, 13321127 + ... + 13445463.

It is an arithmetic number, because the mean of its divisors is an integer number (127161218628).

Almost surely, 2^{1664038750415} is an apocalyptic number.

1664038750415 is a deficient number, since it is larger than the sum of its proper divisors (370540747633).

1664038750415 is a wasteful number, since it uses less digits than its factorization.

1664038750415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174898.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 1664038750415 in words is "one trillion, six hundred sixty-four billion, thirty-eight million, seven hundred fifty thousand, four hundred fifteen".