2051274778019 has 4 divisors (see below), whose sum is σ = 2051288388744. Its totient is φ = 2051261167296.

The previous prime is 2051274777991. The next prime is 2051274778043. The reversal of 2051274778019 is 9108774721502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2051274778019 - 2²⁸ = 2051006342563 is a prime.

It is a super-2 number, since 2×2051274778019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051274778219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6576737 + ... + 6881570.

It is an arithmetic number, because the mean of its divisors is an integer number (512822097186).

Almost surely, 2^{2051274778019} is an apocalyptic number.

2051274778019 is a deficient number, since it is larger than the sum of its proper divisors (13610725).

2051274778019 is a wasteful number, since it uses less digits than its factorization.

2051274778019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13610724.

The product of its (nonzero) digits is 1975680, while the sum is 53.

The spelling of 2051274778019 in words is "two trillion, fifty-one billion, two hundred seventy-four million, seven hundred seventy-eight thousand, nineteen".