61859144975 has 12 divisors (see below), whose sum is σ = 76721733840. Its totient is φ = 49476739200.

The previous prime is 61859144957. The next prime is 61859144993. The reversal of 61859144975 is 57944195816.

It is an interprime number because it is at equal distance from previous prime (61859144957) and next prime (61859144993).

It is not a de Polignac number, because 61859144975 - 2¹² = 61859140879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144035 + ... + 380084.

It is an arithmetic number, because the mean of its divisors is an integer number (6393477820).

Almost surely, 2^61859144975 is an apocalyptic number.

61859144975 is a deficient number, since it is larger than the sum of its proper divisors (14862588865).

61859144975 is a wasteful number, since it uses less digits than its factorization.

61859144975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528850 (or 528845 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 59.

The spelling of 61859144975 in words is "sixty-one billion, eight hundred fifty-nine million, one hundred forty-four thousand, nine hundred seventy-five".