31616311311621 has 32 divisors (see below), whose sum is σ = 47433155328000. Its totient is φ = 20810176221744.

The previous prime is 31616311311577. The next prime is 31616311311653. The reversal of 31616311311621 is 12611311361613.

31616311311621 is a `hidden beast` number, since 3 + 1 + 6 + 1 + 6 + 3 + 1 + 13 + 11 + 621 = 666.

It is not a de Polignac number, because 31616311311621 - 2¹⁹ = 31616310787333 is a prime.

It is a super-2 number, since 2×31616311311621² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31616311311671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88219090 + ... + 88576748.

It is an arithmetic number, because the mean of its divisors is an integer number (1482286104000).

Almost surely, 2^{31616311311621} is an apocalyptic number.

It is an amenable number.

31616311311621 is a deficient number, since it is larger than the sum of its proper divisors (15816844016379).

31616311311621 is a wasteful number, since it uses less digits than its factorization.

31616311311621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399190 (or 399184 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The spelling of 31616311311621 in words is "thirty-one trillion, six hundred sixteen billion, three hundred eleven million, three hundred eleven thousand, six hundred twenty-one".