31421561634629 has 16 divisors (see below), whose sum is σ = 32279373434880. Its totient is φ = 30569585321520.

The previous prime is 31421561634577. The next prime is 31421561634689. The reversal of 31421561634629 is 92643616512413.

It is a cyclic number.

It is not a de Polignac number, because 31421561634629 - 2²⁴ = 31421544857413 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 (31421561634689) 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, 44478632 + ... + 45179550.

It is an arithmetic number, because the mean of its divisors is an integer number (2017460839680).

Almost surely, 2^{31421561634629} is an apocalyptic number.

It is an amenable number.

31421561634629 is a deficient number, since it is larger than the sum of its proper divisors (857811800251).

31421561634629 is a wasteful number, since it uses less digits than its factorization.

31421561634629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705080.

The product of its digits is 5598720, while the sum is 53.

The spelling of 31421561634629 in words is "thirty-one trillion, four hundred twenty-one billion, five hundred sixty-one million, six hundred thirty-four thousand, six hundred twenty-nine".