61257230851 has 4 divisors (see below), whose sum is σ = 61257795912. Its totient is φ = 61256665792.

The previous prime is 61257230843. The next prime is 61257230861. The reversal of 61257230851 is 15803275216.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61257230851 - 2³ = 61257230843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61257230861) 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, 63121 + ... + 355666.

It is an arithmetic number, because the mean of its divisors is an integer number (15314448978).

Almost surely, 2^61257230851 is an apocalyptic number.

61257230851 is a deficient number, since it is larger than the sum of its proper divisors (565061).

61257230851 is a wasteful number, since it uses less digits than its factorization.

61257230851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565060.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 61257230851 in words is "sixty-one billion, two hundred fifty-seven million, two hundred thirty thousand, eight hundred fifty-one".