61448718387 has 16 divisors (see below), whose sum is σ = 98564360960. Its totient is φ = 33265471392.

The previous prime is 61448718343. The next prime is 61448718433. The reversal of 61448718387 is 78381784416.

It is not a de Polignac number, because 61448718387 - 2⁷ = 61448718259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61448714387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77003008 + ... + 77003805.

It is an arithmetic number, because the mean of its divisors is an integer number (6160272560).

Almost surely, 2^61448718387 is an apocalyptic number.

61448718387 is a deficient number, since it is larger than the sum of its proper divisors (37115642573).

61448718387 is a wasteful number, since it uses less digits than its factorization.

61448718387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154006842.

The product of its digits is 7225344, while the sum is 57.

The spelling of 61448718387 in words is "sixty-one billion, four hundred forty-eight million, seven hundred eighteen thousand, three hundred eighty-seven".