61911029376 has 320 divisors, whose sum is σ = 211223950080. Its totient is φ = 17633728512.

The previous prime is 61911029333. The next prime is 61911029377. The reversal of 61911029376 is 67392011916.

61911029376 is a `hidden beast` number, since 619 + 1 + 1 + 0 + 29 + 3 + 7 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (61911029377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27069705 + ... + 27071991.

It is an arithmetic number, because the mean of its divisors is an integer number (660074844).

Almost surely, 2^61911029376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61911029376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105611975040).

61911029376 is an abundant number, since it is smaller than the sum of its proper divisors (149312920704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61911029376 is a wasteful number, since it uses less digits than its factorization.

61911029376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693 (or 2672 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 61911029376 in words is "sixty-one billion, nine hundred eleven million, twenty-nine thousand, three hundred seventy-six".