51505254261642 has 8 divisors (see below), whose sum is σ = 103010508523296. Its totient is φ = 17168418087212.

The previous prime is 51505254261619. The next prime is 51505254261653. The reversal of 51505254261642 is 24616245250515.

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

51505254261642 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 51505254261591 and 51505254261600.

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, 4292104521798 + ... + 4292104521809.

It is an arithmetic number, because the mean of its divisors is an integer number (12876313565412).

Almost surely, 2^{51505254261642} is an apocalyptic number.

51505254261642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51505254261642 is a wasteful number, since it uses less digits than its factorization.

51505254261642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584209043612.

The product of its (nonzero) digits is 2880000, while the sum is 48.

The spelling of 51505254261642 in words is "fifty-one trillion, five hundred five billion, two hundred fifty-four million, two hundred sixty-one thousand, six hundred forty-two".