12520656345452 has 6 divisors (see below), whose sum is σ = 21911148604548. Its totient is φ = 6260328172724.

The previous prime is 12520656345383. The next prime is 12520656345467. The reversal of 12520656345452 is 25454365602521.

It is a happy number.

It is a super-2 number, since 2×12520656345452² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12520656345452.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565082043178 + ... + 1565082043185.

It is an arithmetic number, because the mean of its divisors is an integer number (3651858100758).

Almost surely, 2^{12520656345452} is an apocalyptic number.

It is an amenable number.

12520656345452 is a deficient number, since it is larger than the sum of its proper divisors (9390492259096).

12520656345452 is a wasteful number, since it uses less digits than its factorization.

12520656345452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130164086367 (or 3130164086365 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 50.

The spelling of 12520656345452 in words is "twelve trillion, five hundred twenty billion, six hundred fifty-six million, three hundred forty-five thousand, four hundred fifty-two".