1551662561254 has 16 divisors (see below), whose sum is σ = 2506609550592. Its totient is φ = 716129745408.

The previous prime is 1551662561233. The next prime is 1551662561399. The reversal of 1551662561254 is 4521652661551.

It is a junction number, because it is equal to n+sod(n) for n = 1551662561198 and 1551662561207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55174 + ... + 1762489.

It is an arithmetic number, because the mean of its divisors is an integer number (156663096912).

Almost surely, 2^{1551662561254} is an apocalyptic number.

1551662561254 is a deficient number, since it is larger than the sum of its proper divisors (954946989338).

1551662561254 is a wasteful number, since it uses less digits than its factorization.

1551662561254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850511.

The product of its digits is 2160000, while the sum is 49.

The spelling of 1551662561254 in words is "one trillion, five hundred fifty-one billion, six hundred sixty-two million, five hundred sixty-one thousand, two hundred fifty-four".