61780742025 has 12 divisors (see below), whose sum is σ = 102144160272. Its totient is φ = 32949729040.

The previous prime is 61780742017. The next prime is 61780742033. The reversal of 61780742025 is 52024708716.

It is an interprime number because it is at equal distance from previous prime (61780742017) and next prime (61780742033).

It is not a de Polignac number, because 61780742025 - 2³ = 61780742017 is a prime.

It is a super-2 number, since 2×61780742025² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411871539 + ... + 411871688.

It is an arithmetic number, because the mean of its divisors is an integer number (8512013356).

Almost surely, 2^61780742025 is an apocalyptic number.

It is an amenable number.

61780742025 is a deficient number, since it is larger than the sum of its proper divisors (40363418247).

61780742025 is a wasteful number, since it uses less digits than its factorization.

61780742025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823743240 (or 823743235 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 61780742025 in words is "sixty-one billion, seven hundred eighty million, seven hundred forty-two thousand, twenty-five".