31440645735550 has 48 divisors (see below), whose sum is σ = 62407133544960. Its totient is φ = 11743277736960.

The previous prime is 31440645735509. The next prime is 31440645735593. The reversal of 31440645735550 is 5553754604413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145518015 + ... + 145733914.

It is an arithmetic number, because the mean of its divisors is an integer number (1300148615520).

Almost surely, 2^{31440645735550} is an apocalyptic number.

31440645735550 is a deficient number, since it is larger than the sum of its proper divisors (30966487809410).

31440645735550 is a wasteful number, since it uses less digits than its factorization.

31440645735550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291252085 (or 291252080 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 52.

The spelling of 31440645735550 in words is "thirty-one trillion, four hundred forty billion, six hundred forty-five million, seven hundred thirty-five thousand, five hundred fifty".