2049517517551 has 16 divisors (see below), whose sum is σ = 2465655443200. Its totient is φ = 1664222303808.

The previous prime is 2049517517527. The next prime is 2049517517587. The reversal of 2049517517551 is 1557157159402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2049517517551 - 2²³ = 2049509128943 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 (2049517517501) 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, 4896736 + ... + 5298778.

It is an arithmetic number, because the mean of its divisors is an integer number (154103465200).

Almost surely, 2^{2049517517551} is an apocalyptic number.

2049517517551 is a deficient number, since it is larger than the sum of its proper divisors (416137925649).

2049517517551 is a wasteful number, since it uses less digits than its factorization.

2049517517551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440398.

The product of its (nonzero) digits is 2205000, while the sum is 52.

The spelling of 2049517517551 in words is "two trillion, forty-nine billion, five hundred seventeen million, five hundred seventeen thousand, five hundred fifty-one".