61745603278 has 8 divisors (see below), whose sum is σ = 93240005400. Its totient is φ = 30665601480.

The previous prime is 61745603251. The next prime is 61745603279. The reversal of 61745603278 is 87230654716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61745603279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103599708 + ... + 103600303.

It is an arithmetic number, because the mean of its divisors is an integer number (11655000675).

Almost surely, 2^61745603278 is an apocalyptic number.

61745603278 is a deficient number, since it is larger than the sum of its proper divisors (31494402122).

61745603278 is a wasteful number, since it uses less digits than its factorization.

61745603278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207200162.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 61745603278 in words is "sixty-one billion, seven hundred forty-five million, six hundred three thousand, two hundred seventy-eight".