61925377869 has 12 divisors (see below), whose sum is σ = 90914125692. Its totient is φ = 40606804800.

The previous prime is 61925377849. The next prime is 61925377919. The reversal of 61925377869 is 96877352916.

61925377869 is a `hidden beast` number, since 6 + 1 + 92 + 537 + 7 + 8 + 6 + 9 = 666.

61925377869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10594584900 + 51330792969 = 102930^2 + 226563^2 .

It is not a de Polignac number, because 61925377869 - 2⁵ = 61925377837 is a prime.

It is a super-2 number, since 2×61925377869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61925377849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56397792 + ... + 56398889.

It is an arithmetic number, because the mean of its divisors is an integer number (7576177141).

Almost surely, 2^61925377869 is an apocalyptic number.

It is an amenable number.

61925377869 is a deficient number, since it is larger than the sum of its proper divisors (28988747823).

61925377869 is a wasteful number, since it uses less digits than its factorization.

61925377869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112796748 (or 112796745 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 61925377869 in words is "sixty-one billion, nine hundred twenty-five million, three hundred seventy-seven thousand, eight hundred sixty-nine".