61978147048 has 16 divisors (see below), whose sum is σ = 116221944960. Its totient is φ = 30985628400.

The previous prime is 61978147039. The next prime is 61978147067. The reversal of 61978147048 is 84074187916.

It is a super-2 number, since 2×61978147048² (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 61978147048.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353368 + ... + 498823.

It is an arithmetic number, because the mean of its divisors is an integer number (7263871560).

Almost surely, 2^61978147048 is an apocalyptic number.

It is an amenable number.

61978147048 is a deficient number, since it is larger than the sum of its proper divisors (54243797912).

61978147048 is a wasteful number, since it uses less digits than its factorization.

61978147048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861288 (or 861284 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 61978147048 in words is "sixty-one billion, nine hundred seventy-eight million, one hundred forty-seven thousand, forty-eight".