1618077321 has 12 divisors (see below), whose sum is σ = 2671111872. Its totient is φ = 924615576.

The previous prime is 1618077311. The next prime is 1618077371. The reversal of 1618077321 is 1237708161.

1618077321 is a `hidden beast` number, since 1 + 618 + 0 + 7 + 7 + 32 + 1 = 666.

It is not a de Polignac number, because 1618077321 - 2⁹ = 1618076809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1618077311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12841821 + ... + 12841946.

It is an arithmetic number, because the mean of its divisors is an integer number (222592656).

Almost surely, 2^1618077321 is an apocalyptic number.

It is an amenable number.

1618077321 is a deficient number, since it is larger than the sum of its proper divisors (1053034551).

1618077321 is a wasteful number, since it uses less digits than its factorization.

1618077321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25683780 (or 25683777 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 1618077321 is about 40225.3318320682. The cubic root of 1618077321 is about 1173.9954766989.

The spelling of 1618077321 in words is "one billion, six hundred eighteen million, seventy-seven thousand, three hundred twenty-one".