61410644287 has 4 divisors (see below), whose sum is σ = 64642783480. Its totient is φ = 58178505096.

The previous prime is 61410644279. The next prime is 61410644293. The reversal of 61410644287 is 78244601416.

It is a happy number.

61410644287 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.

It is not a de Polignac number, because 61410644287 - 2³ = 61410644279 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 (61410644227) 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, 1616069568 + ... + 1616069605.

It is an arithmetic number, because the mean of its divisors is an integer number (16160695870).

Almost surely, 2^61410644287 is an apocalyptic number.

61410644287 is a deficient number, since it is larger than the sum of its proper divisors (3232139193).

61410644287 is a wasteful number, since it uses less digits than its factorization.

61410644287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232139192.

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 61410644287 in words is "sixty-one billion, four hundred ten million, six hundred forty-four thousand, two hundred eighty-seven".