1405621632655 has 16 divisors (see below), whose sum is σ = 1728328891968. Its totient is φ = 1096789408000.

The previous prime is 1405621632643. The next prime is 1405621632673. The reversal of 1405621632655 is 5562361265041.

It is not a de Polignac number, because 1405621632655 - 2³⁹ = 855865818767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74836 + ... + 1678345.

It is an arithmetic number, because the mean of its divisors is an integer number (108020555748).

Almost surely, 2^{1405621632655} is an apocalyptic number.

1405621632655 is a deficient number, since it is larger than the sum of its proper divisors (322707259313).

1405621632655 is a wasteful number, since it uses less digits than its factorization.

1405621632655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757138.

The product of its (nonzero) digits is 1296000, while the sum is 46.

Adding to 1405621632655 its reverse (5562361265041), we get a palindrome (6967982897696).

The spelling of 1405621632655 in words is "one trillion, four hundred five billion, six hundred twenty-one million, six hundred thirty-two thousand, six hundred fifty-five".