61963929072 has 80 divisors (see below), whose sum is σ = 178753440000. Its totient is φ = 20550822336.

The previous prime is 61963929029. The next prime is 61963929073. The reversal of 61963929072 is 27092936916.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61963929073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274422 + ... + 446357.

It is an arithmetic number, because the mean of its divisors is an integer number (2234418000).

Almost surely, 2^61963929072 is an apocalyptic number.

It is an amenable number.

61963929072 is an abundant number, since it is smaller than the sum of its proper divisors (116789510928).

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

61963929072 is a wasteful number, since it uses less digits than its factorization.

61963929072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720995 (or 720983 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 61963929072 in words is "sixty-one billion, nine hundred sixty-three million, nine hundred twenty-nine thousand, seventy-two".