1551661115006 has 16 divisors (see below), whose sum is σ = 2456289435600. Its totient is φ = 733107909888.

The previous prime is 1551661115003. The next prime is 1551661115027. The reversal of 1551661115006 is 6005111661551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551661115003) 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, 52470035 + ... + 52499598.

It is an arithmetic number, because the mean of its divisors is an integer number (153518089725).

Almost surely, 2^{1551661115006} is an apocalyptic number.

1551661115006 is a deficient number, since it is larger than the sum of its proper divisors (904628320594).

1551661115006 is a wasteful number, since it uses less digits than its factorization.

1551661115006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104970043.

The product of its (nonzero) digits is 27000, while the sum is 38.

Adding to 1551661115006 its reverse (6005111661551), we get a palindrome (7556772776557).

The spelling of 1551661115006 in words is "one trillion, five hundred fifty-one billion, six hundred sixty-one million, one hundred fifteen thousand, six".