61213865452 has 12 divisors (see below), whose sum is σ = 110019515200. Its totient is φ = 29779718256.

The previous prime is 61213865371. The next prime is 61213865477. The reversal of 61213865452 is 25456831216.

It is a junction number, because it is equal to n+sod(n) for n = 61213865399 and 61213865408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206803452 + ... + 206803747.

Almost surely, 2^61213865452 is an apocalyptic number.

It is an amenable number.

61213865452 is a deficient number, since it is larger than the sum of its proper divisors (48805649748).

61213865452 is a wasteful number, since it uses less digits than its factorization.

61213865452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413607240 (or 413607238 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The spelling of 61213865452 in words is "sixty-one billion, two hundred thirteen million, eight hundred sixty-five thousand, four hundred fifty-two".