1118977816 has 32 divisors (see below), whose sum is σ = 2292400080. Its totient is φ = 507830400.

The previous prime is 1118977813. The next prime is 1118977819. The reversal of 1118977816 is 6187798111.

It is an interprime number because it is at equal distance from previous prime (1118977813) and next prime (1118977819).

It is a super-2 number, since 2×1118977816² = 2504222705400259712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1118977816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118977813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48550 + ... + 67786.

Almost surely, 2^1118977816 is an apocalyptic number.

It is an amenable number.

1118977816 is an abundant number, since it is smaller than the sum of its proper divisors (1173422264).

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

1118977816 is a wasteful number, since it uses less digits than its factorization.

1118977816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19915 (or 19911 counting only the distinct ones).

The product of its digits is 169344, while the sum is 49.

The square root of 1118977816 is about 33451.1257807566. The cubic root of 1118977816 is about 1038.1827906130.

The spelling of 1118977816 in words is "one billion, one hundred eighteen million, nine hundred seventy-seven thousand, eight hundred sixteen".