61138626766 has 32 divisors (see below), whose sum is σ = 107676844992. Its totient is φ = 25485788160.

The previous prime is 61138626727. The next prime is 61138626799. The reversal of 61138626766 is 66762683116.

61138626766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1723440 + ... + 1758556.

It is an arithmetic number, because the mean of its divisors is an integer number (3364901406).

Almost surely, 2^61138626766 is an apocalyptic number.

61138626766 is a deficient number, since it is larger than the sum of its proper divisors (46538218226).

61138626766 is a wasteful number, since it uses less digits than its factorization.

61138626766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38524.

The product of its digits is 2612736, while the sum is 52.

The spelling of 61138626766 in words is "sixty-one billion, one hundred thirty-eight million, six hundred twenty-six thousand, seven hundred sixty-six".