31403766144 has 32 divisors (see below), whose sum is σ = 83416254840. Its totient is φ = 10467921920.

The previous prime is 31403766131. The next prime is 31403766209. The reversal of 31403766144 is 44166730413.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40889937 + ... + 40890704.

Almost surely, 2^31403766144 is an apocalyptic number.

It is an amenable number.

31403766144 is an abundant number, since it is smaller than the sum of its proper divisors (52012488696).

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

31403766144 is an equidigital number, since it uses as much as digits as its factorization.

31403766144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81780658 (or 81780646 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 31403766144 in words is "thirty-one billion, four hundred three million, seven hundred sixty-six thousand, one hundred forty-four".