1377478780774 has 8 divisors (see below), whose sum is σ = 2066492628360. Its totient is φ = 688647904656.

The previous prime is 1377478780771. The next prime is 1377478780789. The reversal of 1377478780774 is 4770878747731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377478780771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45724044 + ... + 45754159.

It is an arithmetic number, because the mean of its divisors is an integer number (258311578545).

Almost surely, 2^{1377478780774} is an apocalyptic number.

1377478780774 is a deficient number, since it is larger than the sum of its proper divisors (689013847586).

1377478780774 is an equidigital number, since it uses as much as digits as its factorization.

1377478780774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91485734.

The product of its (nonzero) digits is 361417728, while the sum is 70.

The spelling of 1377478780774 in words is "one trillion, three hundred seventy-seven billion, four hundred seventy-eight million, seven hundred eighty thousand, seven hundred seventy-four".