51742498619 has 16 divisors (see below), whose sum is σ = 64952993280. Its totient is φ = 40189659840.

The previous prime is 51742498609. The next prime is 51742498649. The reversal of 51742498619 is 91689424715.

It is a cyclic number.

It is not a de Polignac number, because 51742498619 - 2¹² = 51742494523 is a prime.

It is a super-2 number, since 2×51742498619² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51742498609) 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, 8454362 + ... + 8460479.

It is an arithmetic number, because the mean of its divisors is an integer number (4059562080).

Almost surely, 2^51742498619 is an apocalyptic number.

51742498619 is a deficient number, since it is larger than the sum of its proper divisors (13210494661).

51742498619 is a wasteful number, since it uses less digits than its factorization.

51742498619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16914890.

The product of its digits is 4354560, while the sum is 56.

The spelling of 51742498619 in words is "fifty-one billion, seven hundred forty-two million, four hundred ninety-eight thousand, six hundred nineteen".