1618651674 has 48 divisors (see below), whose sum is σ = 3640963872. Its totient is φ = 538958448.

The previous prime is 1618651637. The next prime is 1618651711. The reversal of 1618651674 is 4761568161.

1618651674 is a `hidden beast` number, since 1 + 61 + 8 + 6 + 516 + 74 = 666.

It is an interprime number because it is at equal distance from previous prime (1618651637) and next prime (1618651711).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 836412 + ... + 838344.

It is an arithmetic number, because the mean of its divisors is an integer number (75853414).

Almost surely, 2^1618651674 is an apocalyptic number.

1618651674 is an abundant number, since it is smaller than the sum of its proper divisors (2022312198).

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

1618651674 is a wasteful number, since it uses less digits than its factorization.

1618651674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673 (or 3661 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1618651674 is about 40232.4703939492. The cubic root of 1618651674 is about 1174.1343674777.

The spelling of 1618651674 in words is "one billion, six hundred eighteen million, six hundred fifty-one thousand, six hundred seventy-four".