1551556151161 has 8 divisors (see below), whose sum is σ = 1560283300800. Its totient is φ = 1542829660080.

The previous prime is 1551556151143. The next prime is 1551556151251. The reversal of 1551556151161 is 1611516551551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1551556151161 - 2⁵ = 1551556151129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551556151261) 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, 5017795 + ... + 5318023.

It is an arithmetic number, because the mean of its divisors is an integer number (195035412600).

Almost surely, 2^{1551556151161} is an apocalyptic number.

It is an amenable number.

1551556151161 is a deficient number, since it is larger than the sum of its proper divisors (8727149639).

1551556151161 is a wasteful number, since it uses less digits than its factorization.

1551556151161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329279.

The product of its digits is 112500, while the sum is 43.

The spelling of 1551556151161 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-six million, one hundred fifty-one thousand, one hundred sixty-one".