61700311251 has 32 divisors (see below), whose sum is σ = 95329382400. Its totient is φ = 39396222720.

The previous prime is 61700311217. The next prime is 61700311279. The reversal of 61700311251 is 15211300716.

61700311251 is a `hidden beast` number, since 617 + 0 + 0 + 31 + 12 + 5 + 1 = 666.

It is not a de Polignac number, because 61700311251 - 2⁹ = 61700310739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (61700311051) 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, 298791 + ... + 461168.

It is an arithmetic number, because the mean of its divisors is an integer number (2979043200).

Almost surely, 2^61700311251 is an apocalyptic number.

61700311251 is a deficient number, since it is larger than the sum of its proper divisors (33629071149).

61700311251 is a wasteful number, since it uses less digits than its factorization.

61700311251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760096 (or 760090 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

Adding to 61700311251 its reverse (15211300716), we get a palindrome (76911611967).

The spelling of 61700311251 in words is "sixty-one billion, seven hundred million, three hundred eleven thousand, two hundred fifty-one".