61356145646 has 16 divisors (see below), whose sum is σ = 97477188480. Its totient is φ = 28864830720.

The previous prime is 61356145603. The next prime is 61356145649. The reversal of 61356145646 is 64654165316.

It is a self number, because there is not a number n which added to its sum of digits gives 61356145646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61356145649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154415 + ... + 382826.

It is an arithmetic number, because the mean of its divisors is an integer number (6092324280).

Almost surely, 2^61356145646 is an apocalyptic number.

61356145646 is a deficient number, since it is larger than the sum of its proper divisors (36121042834).

61356145646 is a wasteful number, since it uses less digits than its factorization.

61356145646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540619.

The product of its digits is 1555200, while the sum is 47.

The spelling of 61356145646 in words is "sixty-one billion, three hundred fifty-six million, one hundred forty-five thousand, six hundred forty-six".