61919095720 has 16 divisors (see below), whose sum is σ = 139317965460. Its totient is φ = 24767638272.

The previous prime is 61919095717. The next prime is 61919095747. The reversal of 61919095720 is 2759091916.

It can be written as a sum of positive squares in 2 ways, for example, as 61918359556 + 736164 = 248834^2 + 858^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 773988657 + ... + 773988736.

Almost surely, 2^61919095720 is an apocalyptic number.

It is an amenable number.

61919095720 is an abundant number, since it is smaller than the sum of its proper divisors (77398869740).

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

61919095720 is a wasteful number, since it uses less digits than its factorization.

61919095720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547977404 (or 1547977400 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 49.

The spelling of 61919095720 in words is "sixty-one billion, nine hundred nineteen million, ninety-five thousand, seven hundred twenty".