61506240143644 has 48 divisors (see below), whose sum is σ = 113743452765600. Its totient is φ = 29020793757696.

The previous prime is 61506240143599. The next prime is 61506240143651. The reversal of 61506240143644 is 44634104260516.

It is a junction number, because it is equal to n+sod(n) for n = 61506240143594 and 61506240143603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109975564 + ... + 110533420.

It is an arithmetic number, because the mean of its divisors is an integer number (2369655265950).

Almost surely, 2^{61506240143644} is an apocalyptic number.

It is an amenable number.

61506240143644 is a deficient number, since it is larger than the sum of its proper divisors (52237212621956).

61506240143644 is a wasteful number, since it uses less digits than its factorization.

61506240143644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563542 (or 563540 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 61506240143644 in words is "sixty-one trillion, five hundred six billion, two hundred forty million, one hundred forty-three thousand, six hundred forty-four".