2660115450391 has 64 divisors (see below), whose sum is σ = 3222996480000. Its totient is φ = 2147497777152.

The previous prime is 2660115450383. The next prime is 2660115450457. The reversal of 2660115450391 is 1930545110662.

It is not a de Polignac number, because 2660115450391 - 2³ = 2660115450383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660115450991) 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, 895961955 + ... + 895964923.

It is an arithmetic number, because the mean of its divisors is an integer number (50359320000).

Almost surely, 2^{2660115450391} is an apocalyptic number.

2660115450391 is a deficient number, since it is larger than the sum of its proper divisors (562881029609).

2660115450391 is a wasteful number, since it uses less digits than its factorization.

2660115450391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 2660115450391 in words is "two trillion, six hundred sixty billion, one hundred fifteen million, four hundred fifty thousand, three hundred ninety-one".