61954638379786 has 32 divisors (see below), whose sum is σ = 93969120500928. Its totient is φ = 30632373158400.

The previous prime is 61954638379757. The next prime is 61954638379841. The reversal of 61954638379786 is 68797383645916.

It is a happy 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, 1530366301 + ... + 1530406783.

It is an arithmetic number, because the mean of its divisors is an integer number (2936535015654).

Almost surely, 2^{61954638379786} is an apocalyptic number.

61954638379786 is a deficient number, since it is larger than the sum of its proper divisors (32014482121142).

61954638379786 is a wasteful number, since it uses less digits than its factorization.

61954638379786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49846.

The product of its digits is 9876142080, while the sum is 82.

The spelling of 61954638379786 in words is "sixty-one trillion, nine hundred fifty-four billion, six hundred thirty-eight million, three hundred seventy-nine thousand, seven hundred eighty-six".