61580321278 has 16 divisors (see below), whose sum is σ = 105686658144. Its totient is φ = 26361468000.

The previous prime is 61580321249. The next prime is 61580321293. The reversal of 61580321278 is 87212308516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2495473 + ... + 2520028.

It is an arithmetic number, because the mean of its divisors is an integer number (6605416134).

Almost surely, 2^61580321278 is an apocalyptic number.

61580321278 is a deficient number, since it is larger than the sum of its proper divisors (44106336866).

61580321278 is a wasteful number, since it uses less digits than its factorization.

61580321278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016387.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 61580321278 in words is "sixty-one billion, five hundred eighty million, three hundred twenty-one thousand, two hundred seventy-eight".