51917206742 has 8 divisors (see below), whose sum is σ = 78019759632. Its totient is φ = 25910620200.

The previous prime is 51917206727. The next prime is 51917206751. The reversal of 51917206742 is 24760271915.

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

It is a junction number, because it is equal to n+sod(n) for n = 51917206693 and 51917206702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23990234 + ... + 23992397.

It is an arithmetic number, because the mean of its divisors is an integer number (9752469954).

Almost surely, 2^51917206742 is an apocalyptic number.

51917206742 is a deficient number, since it is larger than the sum of its proper divisors (26102552890).

51917206742 is a wasteful number, since it uses less digits than its factorization.

51917206742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47983174.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 51917206742 in words is "fifty-one billion, nine hundred seventeen million, two hundred six thousand, seven hundred forty-two".