61287430925 has 24 divisors (see below), whose sum is σ = 88149375936. Its totient is φ = 41398410240.

The previous prime is 61287430909. The next prime is 61287430933. The reversal of 61287430925 is 52903478216.

61287430925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61287430925 - 2⁴ = 61287430909 is a prime.

It is a super-2 number, since 2×61287430925² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61287430925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2601812 + ... + 2625261.

It is an arithmetic number, because the mean of its divisors is an integer number (3672890664).

It is a 1-persistent number, because it is pandigital, but 2⋅61287430925 = 122574861850 is not.

Almost surely, 2^61287430925 is an apocalyptic number.

It is an amenable number.

61287430925 is a deficient number, since it is larger than the sum of its proper divisors (26861945011).

61287430925 is a wasteful number, since it uses less digits than its factorization.

61287430925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227157 (or 5227152 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 61287430925 in words is "sixty-one billion, two hundred eighty-seven million, four hundred thirty thousand, nine hundred twenty-five".