61340541644 has 6 divisors (see below), whose sum is σ = 107345947884. Its totient is φ = 30670270820.

The previous prime is 61340541607. The next prime is 61340541671. The reversal of 61340541644 is 44614504316.

It is a junction number, because it is equal to n+sod(n) for n = 61340541598 and 61340541607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7667567702 + ... + 7667567709.

It is an arithmetic number, because the mean of its divisors is an integer number (17890991314).

Almost surely, 2^61340541644 is an apocalyptic number.

It is an amenable number.

61340541644 is a deficient number, since it is larger than the sum of its proper divisors (46005406240).

61340541644 is a wasteful number, since it uses less digits than its factorization.

61340541644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15335135415 (or 15335135413 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 61340541644 in words is "sixty-one billion, three hundred forty million, five hundred forty-one thousand, six hundred forty-four".