612665621451 has 128 divisors (see below), whose sum is σ = 1051045632000. Its totient is φ = 349376053248.

The previous prime is 612665621429. The next prime is 612665621453. The reversal of 612665621451 is 154126566216.

612665621451 is a `hidden beast` number, since 6 + 1 + 26 + 6 + 562 + 14 + 51 = 666.

It is not a de Polignac number, because 612665621451 - 2³³ = 604075686859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 612665621397 and 612665621406.

It is not an unprimeable number, because it can be changed into a prime (612665621453) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 110010795 + ... + 110016363.

It is an arithmetic number, because the mean of its divisors is an integer number (8211294000).

Almost surely, 2^612665621451 is an apocalyptic number.

612665621451 is a deficient number, since it is larger than the sum of its proper divisors (438380010549).

612665621451 is a wasteful number, since it uses less digits than its factorization.

612665621451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5890 (or 5884 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 612665621451 in words is "six hundred twelve billion, six hundred sixty-five million, six hundred twenty-one thousand, four hundred fifty-one".