1371261880777 has 4 divisors (see below), whose sum is σ = 1371282861520. Its totient is φ = 1371240900036.

The previous prime is 1371261880753. The next prime is 1371261880819. The reversal of 1371261880777 is 7770881621731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1371261880777 - 2⁷ = 1371261880649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371261880717) 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, 10392027 + ... + 10523152.

It is an arithmetic number, because the mean of its divisors is an integer number (342820715380).

Almost surely, 2^{1371261880777} is an apocalyptic number.

It is an amenable number.

1371261880777 is a deficient number, since it is larger than the sum of its proper divisors (20980743).

1371261880777 is an equidigital number, since it uses as much as digits as its factorization.

1371261880777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20980742.

The product of its (nonzero) digits is 5531904, while the sum is 58.

The spelling of 1371261880777 in words is "one trillion, three hundred seventy-one billion, two hundred sixty-one million, eight hundred eighty thousand, seven hundred seventy-seven".