1551010155556 has 6 divisors (see below), whose sum is σ = 2714267772230. Its totient is φ = 775505077776.

The previous prime is 1551010155529. The next prime is 1551010155581. The reversal of 1551010155556 is 6555510101551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1481614790656 + 69395364900 = 1217216^2 + 263430^2 .

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 as a sum of consecutive naturals, namely, 193876269441 + ... + 193876269448.

Almost surely, 2^{1551010155556} is an apocalyptic number.

It is an amenable number.

1551010155556 is a deficient number, since it is larger than the sum of its proper divisors (1163257616674).

1551010155556 is a wasteful number, since it uses less digits than its factorization.

1551010155556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387752538893 (or 387752538891 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 40.

The spelling of 1551010155556 in words is "one trillion, five hundred fifty-one billion, ten million, one hundred fifty-five thousand, five hundred fifty-six".