31423326648 has 32 divisors (see below), whose sum is σ = 89780933760. Its totient is φ = 8978093280.

The previous prime is 31423326647. The next prime is 31423326689. The reversal of 31423326648 is 84662332413.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423326647) 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, 93521638 + ... + 93521973.

It is an arithmetic number, because the mean of its divisors is an integer number (2805654180).

Almost surely, 2^31423326648 is an apocalyptic number.

It is an amenable number.

31423326648 is an abundant number, since it is smaller than the sum of its proper divisors (58357607112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31423326648 is a wasteful number, since it uses less digits than its factorization.

31423326648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187043627 (or 187043623 counting only the distinct ones).

The product of its digits is 497664, while the sum is 42.

The spelling of 31423326648 in words is "thirty-one billion, four hundred twenty-three million, three hundred twenty-six thousand, six hundred forty-eight".