1361777620671 has 80 divisors (see below), whose sum is σ = 2214817887744. Its totient is φ = 828819081216.

The previous prime is 1361777620661. The next prime is 1361777620729. The reversal of 1361777620671 is 1760267771631.

It is a happy number.

1361777620671 is a `hidden beast` number, since 1 + 3 + 6 + 1 + 7 + 7 + 7 + 620 + 6 + 7 + 1 = 666.

It is not a de Polignac number, because 1361777620671 - 2¹³ = 1361777612479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361777620661) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 191715106 + ... + 191722208.

Almost surely, 2^{1361777620671} is an apocalyptic number.

1361777620671 is a deficient number, since it is larger than the sum of its proper divisors (853040267073).

1361777620671 is a wasteful number, since it uses less digits than its factorization.

1361777620671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9102 (or 9093 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 54.

The spelling of 1361777620671 in words is "one trillion, three hundred sixty-one billion, seven hundred seventy-seven million, six hundred twenty thousand, six hundred seventy-one".