1618751956 has 12 divisors (see below), whose sum is σ = 2833108768. Its totient is φ = 809292312.

The previous prime is 1618751879. The next prime is 1618751969. The reversal of 1618751956 is 6591578161.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47425 + ... + 74071.

Almost surely, 2^1618751956 is an apocalyptic number.

It is an amenable number.

1618751956 is a deficient number, since it is larger than the sum of its proper divisors (1214356812).

1618751956 is a wasteful number, since it uses less digits than its factorization.

1618751956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41838 (or 41836 counting only the distinct ones).

The product of its digits is 453600, while the sum is 49.

The square root of 1618751956 is about 40233.7166565556. The cubic root of 1618751956 is about 1174.1586144303.

The spelling of 1618751956 in words is "one billion, six hundred eighteen million, seven hundred fifty-one thousand, nine hundred fifty-six".