1361261630672 has 10 divisors (see below), whose sum is σ = 2637444409458. Its totient is φ = 680630815328.

The previous prime is 1361261630653. The next prime is 1361261630681. The reversal of 1361261630672 is 2760361621631.

It can be written as a sum of positive squares in only one way, i.e., 778213322896 + 583048307776 = 882164^2 + 763576^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42539425943 + ... + 42539425974.

Almost surely, 2^{1361261630672} is an apocalyptic number.

It is an amenable number.

1361261630672 is a deficient number, since it is larger than the sum of its proper divisors (1276182778786).

1361261630672 is an equidigital number, since it uses as much as digits as its factorization.

1361261630672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85078851925 (or 85078851919 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 1361261630672 in words is "one trillion, three hundred sixty-one billion, two hundred sixty-one million, six hundred thirty thousand, six hundred seventy-two".