1377031864321 has 2 divisors, whose sum is σ = 1377031864322. Its totient is φ = 1377031864320.

The previous prime is 1377031864217. The next prime is 1377031864337. The reversal of 1377031864321 is 1234681307731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 781171377921 + 595860486400 = 883839^2 + 771920^2 .

It is an emirp because it is prime and its reverse (1234681307731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377031864321 - 2¹¹ = 1377031862273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377031864121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688515932160 + 688515932161.

It is an arithmetic number, because the mean of its divisors is an integer number (688515932161).

Almost surely, 2^{1377031864321} is an apocalyptic number.

It is an amenable number.

1377031864321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377031864321 is an equidigital number, since it uses as much as digits as its factorization.

1377031864321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 1377031864321 in words is "one trillion, three hundred seventy-seven billion, thirty-one million, eight hundred sixty-four thousand, three hundred twenty-one".