551650163442 has 64 divisors (see below), whose sum is σ = 1278648391680. Its totient is φ = 155399174784.

The previous prime is 551650163437. The next prime is 551650163479. The reversal of 551650163442 is 244361056155.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 551650163394 and 551650163403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8869609 + ... + 8931587.

It is an arithmetic number, because the mean of its divisors is an integer number (19978881120).

Almost surely, 2^551650163442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551650163442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639324195840).

551650163442 is an abundant number, since it is smaller than the sum of its proper divisors (726998228238).

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

551650163442 is a wasteful number, since it uses less digits than its factorization.

551650163442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64967.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 551650163442 in words is "five hundred fifty-one billion, six hundred fifty million, one hundred sixty-three thousand, four hundred forty-two".