61780053461 has 4 divisors (see below), whose sum is σ = 70605775392. Its totient is φ = 52954331532.

The previous prime is 61780053451. The next prime is 61780053473. The reversal of 61780053461 is 16435008716.

61780053461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61780053461 - 2²² = 61775859157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61780053431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4412860955 + ... + 4412860968.

It is an arithmetic number, because the mean of its divisors is an integer number (17651443848).

Almost surely, 2^61780053461 is an apocalyptic number.

It is an amenable number.

61780053461 is a deficient number, since it is larger than the sum of its proper divisors (8825721931).

61780053461 is an equidigital number, since it uses as much as digits as its factorization.

61780053461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825721930.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 61780053461 in words is "sixty-one billion, seven hundred eighty million, fifty-three thousand, four hundred sixty-one".