31343454452640 has 192 divisors, whose sum is σ = 107716356582912. Its totient is φ = 7597788902400.

The previous prime is 31343454452561. The next prime is 31343454452677. The reversal of 31343454452640 is 4625445434313.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 31343454452640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65714859 + ... + 66190101.

It is an arithmetic number, because the mean of its divisors is an integer number (561022690536).

Almost surely, 2^{31343454452640} is an apocalyptic number.

31343454452640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31343454452640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53858178291456).

31343454452640 is an abundant number, since it is smaller than the sum of its proper divisors (76372902130272).

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

31343454452640 is a wasteful number, since it uses less digits than its factorization.

31343454452640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487763 (or 487755 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 48.

Adding to 31343454452640 its reverse (4625445434313), we get a palindrome (35968899886953).

The spelling of 31343454452640 in words is "thirty-one trillion, three hundred forty-three billion, four hundred fifty-four million, four hundred fifty-two thousand, six hundred forty".