1377370330661 has 16 divisors (see below), whose sum is σ = 1524258504048. Its totient is φ = 1236368448000.

The previous prime is 1377370330613. The next prime is 1377370330697. The reversal of 1377370330661 is 1660330737731.

It can be written as a sum of positive squares in 8 ways, for example, as 35407948900 + 1341962381761 = 188170^2 + 1158431^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377370330661 - 2¹⁴ = 1377370314277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377370330561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71291 + ... + 1661271.

It is an arithmetic number, because the mean of its divisors is an integer number (95266156503).

Almost surely, 2^{1377370330661} is an apocalyptic number.

It is an amenable number.

1377370330661 is a deficient number, since it is larger than the sum of its proper divisors (146888173387).

1377370330661 is a wasteful number, since it uses less digits than its factorization.

1377370330661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591832.

The product of its (nonzero) digits is 1000188, while the sum is 47.

The spelling of 1377370330661 in words is "one trillion, three hundred seventy-seven billion, three hundred seventy million, three hundred thirty thousand, six hundred sixty-one".