3780787991051 has 4 divisors (see below), whose sum is σ = 3781452575400. Its totient is φ = 3780123406704.

The previous prime is 3780787991021. The next prime is 3780787991063. The reversal of 3780787991051 is 1501997870873.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3780787991051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3780787991021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332283641 + ... + 332295018.

It is an arithmetic number, because the mean of its divisors is an integer number (945363143850).

Almost surely, 2^{3780787991051} is an apocalyptic number.

3780787991051 is a deficient number, since it is larger than the sum of its proper divisors (664584349).

3780787991051 is an equidigital number, since it uses as much as digits as its factorization.

3780787991051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664584348.

The product of its (nonzero) digits is 26671680, while the sum is 65.

The spelling of 3780787991051 in words is "three trillion, seven hundred eighty billion, seven hundred eighty-seven million, nine hundred ninety-one thousand, fifty-one".