1901778696 has 64 divisors (see below), whose sum is σ = 5287838400. Its totient is φ = 633312000.

The previous prime is 1901778689. The next prime is 1901778707. The reversal of 1901778696 is 6968771091.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255751 + ... + 263081.

It is an arithmetic number, because the mean of its divisors is an integer number (82622475).

Almost surely, 2^1901778696 is an apocalyptic number.

It is an amenable number.

1901778696 is an abundant number, since it is smaller than the sum of its proper divisors (3386059704).

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

1901778696 is a wasteful number, since it uses less digits than its factorization.

1901778696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547 (or 8537 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 1901778696 is about 43609.3877049426. The cubic root of 1901778696 is about 1238.9487048513.

The spelling of 1901778696 in words is "one billion, nine hundred one million, seven hundred seventy-eight thousand, six hundred ninety-six".