1551620118 has 64 divisors (see below), whose sum is σ = 3294120960. Its totient is φ = 486431232.

The previous prime is 1551620101. The next prime is 1551620143. The reversal of 1551620118 is 8110261551.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2755705 + ... + 2756267.

It is an arithmetic number, because the mean of its divisors is an integer number (51470640).

Almost surely, 2^1551620118 is an apocalyptic number.

1551620118 is an abundant number, since it is smaller than the sum of its proper divisors (1742500842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1551620118 is a wasteful number, since it uses less digits than its factorization.

1551620118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 2400, while the sum is 30.

The square root of 1551620118 is about 39390.6095154670. The cubic root of 1551620118 is about 1157.6976027074.

Adding to 1551620118 its reverse (8110261551), we get a palindrome (9661881669).

The spelling of 1551620118 in words is "one billion, five hundred fifty-one million, six hundred twenty thousand, one hundred eighteen".