1551156566164 has 12 divisors (see below), whose sum is σ = 2874201872724. Its totient is φ = 729956031104.

The previous prime is 1551156566153. The next prime is 1551156566171. The reversal of 1551156566164 is 4616656511551.

It can be written as a sum of positive squares in 2 ways, for example, as 1328648128900 + 222508437264 = 1152670^2 + 471708^2 .

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, 11405562919 + ... + 11405563054.

It is an arithmetic number, because the mean of its divisors is an integer number (239516822727).

Almost surely, 2^{1551156566164} is an apocalyptic number.

It is an amenable number.

1551156566164 is a deficient number, since it is larger than the sum of its proper divisors (1323045306560).

1551156566164 is a wasteful number, since it uses less digits than its factorization.

1551156566164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22811125994 (or 22811125992 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 52.

The spelling of 1551156566164 in words is "one trillion, five hundred fifty-one billion, one hundred fifty-six million, five hundred sixty-six thousand, one hundred sixty-four".