1618416157 has 4 divisors (see below), whose sum is σ = 1622924640. Its totient is φ = 1613907676.

The previous prime is 1618416119. The next prime is 1618416169. The reversal of 1618416157 is 7516148161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1618416157 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618416187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253703 + ... + 2254420.

It is an arithmetic number, because the mean of its divisors is an integer number (405731160).

Almost surely, 2^1618416157 is an apocalyptic number.

It is an amenable number.

1618416157 is a deficient number, since it is larger than the sum of its proper divisors (4508483).

1618416157 is an equidigital number, since it uses as much as digits as its factorization.

1618416157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508482.

The product of its digits is 40320, while the sum is 40.

The square root of 1618416157 is about 40229.5433357129. The cubic root of 1618416157 is about 1174.0774184295.

The spelling of 1618416157 in words is "one billion, six hundred eighteen million, four hundred sixteen thousand, one hundred fifty-seven".