1778520996 has 192 divisors, whose sum is σ = 5408972800. Its totient is φ = 494926848.

The previous prime is 1778520967. The next prime is 1778521007. The reversal of 1778520996 is 6990258771.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5793075 + ... + 5793381.

Almost surely, 2^1778520996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1778520996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2704486400).

1778520996 is an abundant number, since it is smaller than the sum of its proper divisors (3630451804).

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

1778520996 is a wasteful number, since it uses less digits than its factorization.

1778520996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The square root of 1778520996 is about 42172.5146985569. The cubic root of 1778520996 is about 1211.5825196774.

It can be divided in two parts, 17785 and 20996, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 1778520996 in words is "one billion, seven hundred seventy-eight million, five hundred twenty thousand, nine hundred ninety-six".