1778374164 has 48 divisors (see below), whose sum is σ = 4750155648. Its totient is φ = 507268608.

The previous prime is 1778374067. The next prime is 1778374181. The reversal of 1778374164 is 4614738771.

It is a super-2 number, since 2×1778374164² = 6325229334365397792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34672 + ... + 68984.

It is an arithmetic number, because the mean of its divisors is an integer number (98961576).

Almost surely, 2^1778374164 is an apocalyptic number.

1778374164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1778374164 is an abundant number, since it is smaller than the sum of its proper divisors (2971781484).

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

1778374164 is a wasteful number, since it uses less digits than its factorization.

1778374164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34944 (or 34942 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 1778374164 is about 42170.7738131517. The cubic root of 1778374164 is about 1211.5491766205.

The spelling of 1778374164 in words is "one billion, seven hundred seventy-eight million, three hundred seventy-four thousand, one hundred sixty-four".