2661553450345 has 8 divisors (see below), whose sum is σ = 3209000938560. Its totient is φ = 2119151561520.

The previous prime is 2661553450327. The next prime is 2661553450349. The reversal of 2661553450345 is 5430543551662.

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

It is not a de Polignac number, because 2661553450345 - 2²¹ = 2661551353193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661553450349) 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, 1261398685 + ... + 1261400794.

It is an arithmetic number, because the mean of its divisors is an integer number (401125117320).

Almost surely, 2^{2661553450345} is an apocalyptic number.

It is an amenable number.

2661553450345 is a deficient number, since it is larger than the sum of its proper divisors (547447488215).

2661553450345 is a wasteful number, since it uses less digits than its factorization.

2661553450345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522799695.

The product of its (nonzero) digits is 6480000, while the sum is 49.

The spelling of 2661553450345 in words is "two trillion, six hundred sixty-one billion, five hundred fifty-three million, four hundred fifty thousand, three hundred forty-five".