61257772043 has 8 divisors (see below), whose sum is σ = 68244733200. Its totient is φ = 54595785888.

The previous prime is 61257772021. The next prime is 61257772061. The reversal of 61257772043 is 34027775216.

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 61257772043 - 2⁶ = 61257771979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61257771985 and 61257772003.

It is not an unprimeable number, because it can be changed into a prime (61257772003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 81243353 + ... + 81244106.

It is an arithmetic number, because the mean of its divisors is an integer number (8530591650).

Almost surely, 2^61257772043 is an apocalyptic number.

61257772043 is a deficient number, since it is larger than the sum of its proper divisors (6986961157).

61257772043 is a wasteful number, since it uses less digits than its factorization.

61257772043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162487501.

The product of its (nonzero) digits is 493920, while the sum is 44.

The spelling of 61257772043 in words is "sixty-one billion, two hundred fifty-seven million, seven hundred seventy-two thousand, forty-three".