1361777620673 has 8 divisors (see below), whose sum is σ = 1362896247048. Its totient is φ = 1360659308544.

The previous prime is 1361777620661. The next prime is 1361777620729. The reversal of 1361777620673 is 3760267771631.

It can be written as a sum of positive squares in 4 ways, for example, as 24303874609 + 1337473746064 = 155897^2 + 1156492^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1361777620673 - 2⁸ = 1361777620417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361777620373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9021065 + ... + 9170777.

It is an arithmetic number, because the mean of its divisors is an integer number (170362030881).

Almost surely, 2^{1361777620673} is an apocalyptic number.

It is an amenable number.

1361777620673 is a deficient number, since it is larger than the sum of its proper divisors (1118626375).

1361777620673 is a wasteful number, since it uses less digits than its factorization.

1361777620673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157123.

The product of its (nonzero) digits is 9335088, while the sum is 56.

The spelling of 1361777620673 in words is "one trillion, three hundred sixty-one billion, seven hundred seventy-seven million, six hundred twenty thousand, six hundred seventy-three".