61985866477125 has 128 divisors (see below), whose sum is σ = 107661011328000. Its totient is φ = 31632818380800.

The previous prime is 61985866477103. The next prime is 61985866477217. The reversal of 61985866477125 is 52177466858916.

It is a happy number.

It is not a de Polignac number, because 61985866477125 - 2⁶ = 61985866477061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (75).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 892400397 + ... + 892469853.

It is an arithmetic number, because the mean of its divisors is an integer number (841101651000).

Almost surely, 2^{61985866477125} is an apocalyptic number.

It is an amenable number.

61985866477125 is a deficient number, since it is larger than the sum of its proper divisors (45675144850875).

61985866477125 is a wasteful number, since it uses less digits than its factorization.

61985866477125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70240 (or 70230 counting only the distinct ones).

The product of its digits is 1219276800, while the sum is 75.

The spelling of 61985866477125 in words is "sixty-one trillion, nine hundred eighty-five billion, eight hundred sixty-six million, four hundred seventy-seven thousand, one hundred twenty-five".