31642681653 has 12 divisors (see below), whose sum is σ = 49861195488. Its totient is φ = 19177382760.

The previous prime is 31642681619. The next prime is 31642681657. The reversal of 31642681653 is 35618624613.

It is not a de Polignac number, because 31642681653 - 2⁶ = 31642681589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31642681599 and 31642681608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31642681657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159811425 + ... + 159811622.

It is an arithmetic number, because the mean of its divisors is an integer number (4155099624).

Almost surely, 2^31642681653 is an apocalyptic number.

31642681653 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31642681653 is a deficient number, since it is larger than the sum of its proper divisors (18218513835).

31642681653 is a wasteful number, since it uses less digits than its factorization.

31642681653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319623064 (or 319623061 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 31642681653 in words is "thirty-one billion, six hundred forty-two million, six hundred eighty-one thousand, six hundred fifty-three".