61121250057 has 32 divisors (see below), whose sum is σ = 93727613952. Its totient is φ = 34705704384.

The previous prime is 61121250041. The next prime is 61121250079. The reversal of 61121250057 is 75005212116.

It is not a de Polignac number, because 61121250057 - 2⁴ = 61121250041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61121250097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2120778 + ... + 2149404.

It is an arithmetic number, because the mean of its divisors is an integer number (2928987936).

Almost surely, 2^61121250057 is an apocalyptic number.

It is an amenable number.

61121250057 is a deficient number, since it is larger than the sum of its proper divisors (32606363895).

61121250057 is a wasteful number, since it uses less digits than its factorization.

61121250057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29277.

The product of its (nonzero) digits is 4200, while the sum is 30.

The spelling of 61121250057 in words is "sixty-one billion, one hundred twenty-one million, two hundred fifty thousand, fifty-seven".