7814478646372 has 12 divisors (see below), whose sum is σ = 13677719719356. Its totient is φ = 3906558726560.

The previous prime is 7814478646363. The next prime is 7814478646391. The reversal of 7814478646372 is 2736468744187.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5158967224896 + 2655511421476 = 2271336^2 + 1629574^2 .

It is a super-2 number, since 2×7814478646372² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7814478646298 and 7814478646307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170123323 + ... + 170169250.

It is an arithmetic number, because the mean of its divisors is an integer number (1139809976613).

Almost surely, 2^{7814478646372} is an apocalyptic number.

It is an amenable number.

7814478646372 is a deficient number, since it is larger than the sum of its proper divisors (5863241072984).

7814478646372 is a wasteful number, since it uses less digits than its factorization.

7814478646372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340298318 (or 340298316 counting only the distinct ones).

The product of its digits is 303464448, while the sum is 67.

The spelling of 7814478646372 in words is "seven trillion, eight hundred fourteen billion, four hundred seventy-eight million, six hundred forty-six thousand, three hundred seventy-two".