1361605515431 has 8 divisors (see below), whose sum is σ = 1556131374240. Its totient is φ = 1167082352928.

The previous prime is 1361605515409. The next prime is 1361605515433. The reversal of 1361605515431 is 1345155061631.

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 1361605515431 - 2³⁸ = 1086727608487 is a prime.

It is a super-2 number, since 2×1361605515431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361605515433) 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, 558245 + ... + 1742081.

It is an arithmetic number, because the mean of its divisors is an integer number (194516421780).

Almost surely, 2^{1361605515431} is an apocalyptic number.

1361605515431 is a deficient number, since it is larger than the sum of its proper divisors (194525858809).

1361605515431 is a wasteful number, since it uses less digits than its factorization.

1361605515431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348153.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 1361605515431 in words is "one trillion, three hundred sixty-one billion, six hundred five million, five hundred fifteen thousand, four hundred thirty-one".