51517861098 has 16 divisors (see below), whose sum is σ = 112402606176. Its totient is φ = 15611473040.

The previous prime is 51517861091. The next prime is 51517861103. The reversal of 51517861098 is 89016871515.

It is a super-2 number, since 2×51517861098² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 51517861098.

It is not an unprimeable number, because it can be changed into a prime (51517861091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390286761 + ... + 390286892.

It is an arithmetic number, because the mean of its divisors is an integer number (7025162886).

Almost surely, 2^51517861098 is an apocalyptic number.

51517861098 is an abundant number, since it is smaller than the sum of its proper divisors (60884745078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51517861098 is a wasteful number, since it uses less digits than its factorization.

51517861098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780573669.

The product of its (nonzero) digits is 604800, while the sum is 51.

The spelling of 51517861098 in words is "fifty-one billion, five hundred seventeen million, eight hundred sixty-one thousand, ninety-eight".