551020125642 has 16 divisors (see below), whose sum is σ = 1259474572992. Its totient is φ = 157434321600.

The previous prime is 551020125613. The next prime is 551020125647. The reversal of 551020125642 is 246521020155.

551020125642 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (551020125647) 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, 6559763359 + ... + 6559763442.

It is an arithmetic number, because the mean of its divisors is an integer number (78717160812).

Almost surely, 2^551020125642 is an apocalyptic number.

551020125642 is an abundant number, since it is smaller than the sum of its proper divisors (708454447350).

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

551020125642 is a wasteful number, since it uses less digits than its factorization.

551020125642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13119526813.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 551020125642 its reverse (246521020155), we get a palindrome (797541145797).

The spelling of 551020125642 in words is "five hundred fifty-one billion, twenty million, one hundred twenty-five thousand, six hundred forty-two".