1911775813408 has 12 divisors (see below), whose sum is σ = 3763808632710. Its totient is φ = 955887906688.

The previous prime is 1911775813373. The next prime is 1911775813417. The reversal of 1911775813408 is 8043185771191.

It can be written as a sum of positive squares in only one way, i.e., 966548529424 + 945227283984 = 983132^2 + 972228^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29871497053 + ... + 29871497116.

Almost surely, 2^{1911775813408} is an apocalyptic number.

It is an amenable number.

1911775813408 is a deficient number, since it is larger than the sum of its proper divisors (1852032819302).

1911775813408 is an equidigital number, since it uses as much as digits as its factorization.

1911775813408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59742994179 (or 59742994171 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 55.

The spelling of 1911775813408 in words is "one trillion, nine hundred eleven billion, seven hundred seventy-five million, eight hundred thirteen thousand, four hundred eight".