1401384631261 has 8 divisors (see below), whose sum is σ = 1405854138080. Its totient is φ = 1396922237712.

The previous prime is 1401384631253. The next prime is 1401384631267. The reversal of 1401384631261 is 1621364831041.

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 1401384631261 - 2³ = 1401384631253 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 (1401384631267) 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, 1383531 + ... + 2171848.

It is an arithmetic number, because the mean of its divisors is an integer number (175731767260).

Almost surely, 2^{1401384631261} is an apocalyptic number.

It is an amenable number.

1401384631261 is a deficient number, since it is larger than the sum of its proper divisors (4469506819).

1401384631261 is an equidigital number, since it uses as much as digits as its factorization.

1401384631261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556635.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 1401384631261 in words is "one trillion, four hundred one billion, three hundred eighty-four million, six hundred thirty-one thousand, two hundred sixty-one".