61728397048 has 32 divisors (see below), whose sum is σ = 117090153360. Its totient is φ = 30505420800.

The previous prime is 61728397007. The next prime is 61728397063. The reversal of 61728397048 is 84079382716.

It is a super-2 number, since 2×61728397048² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61728397048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400015 + ... + 532417.

Almost surely, 2^61728397048 is an apocalyptic number.

It is an amenable number.

61728397048 is a deficient number, since it is larger than the sum of its proper divisors (55361756312).

61728397048 is a wasteful number, since it uses less digits than its factorization.

61728397048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133087 (or 133083 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 61728397048 in words is "sixty-one billion, seven hundred twenty-eight million, three hundred ninety-seven thousand, forty-eight".