61257807761 has 8 divisors (see below), whose sum is σ = 61986161664. Its totient is φ = 60533298000.

The previous prime is 61257807757. The next prime is 61257807881. The reversal of 61257807761 is 16770875216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61257807761 - 2² = 61257807757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61257807161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928970 + ... + 992723.

It is an arithmetic number, because the mean of its divisors is an integer number (7748270208).

Almost surely, 2^61257807761 is an apocalyptic number.

It is an amenable number.

61257807761 is a deficient number, since it is larger than the sum of its proper divisors (728353903).

61257807761 is a wasteful number, since it uses less digits than its factorization.

61257807761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922071.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 61257807761 in words is "sixty-one billion, two hundred fifty-seven million, eight hundred seven thousand, seven hundred sixty-one".