61672778338 has 8 divisors (see below), whose sum is σ = 97378071120. Its totient is φ = 29213421300.

The previous prime is 61672778317. The next prime is 61672778359. The reversal of 61672778338 is 83387727616.

It is an interprime number because it is at equal distance from previous prime (61672778317) and next prime (61672778359).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811483888 + ... + 811483963.

It is an arithmetic number, because the mean of its divisors is an integer number (12172258890).

Almost surely, 2^61672778338 is an apocalyptic number.

61672778338 is a deficient number, since it is larger than the sum of its proper divisors (35705292782).

61672778338 is a wasteful number, since it uses less digits than its factorization.

61672778338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622967872.

The product of its digits is 14224896, while the sum is 58.

The spelling of 61672778338 in words is "sixty-one billion, six hundred seventy-two million, seven hundred seventy-eight thousand, three hundred thirty-eight".