61764100551 has 12 divisors (see below), whose sum is σ = 89246032200. Its totient is φ = 41161657680.

The previous prime is 61764100523. The next prime is 61764100583. The reversal of 61764100551 is 15500146716.

It is a happy number.

61764100551 is a `hidden beast` number, since 6 + 1 + 7 + 641 + 0 + 0 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 61764100551 - 2¹³ = 61764092359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61764100351) 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 11 ways as a sum of consecutive naturals, for example, 1173601 + ... + 1225098.

It is an arithmetic number, because the mean of its divisors is an integer number (7437169350).

Almost surely, 2^61764100551 is an apocalyptic number.

61764100551 is a deficient number, since it is larger than the sum of its proper divisors (27481931649).

61764100551 is a wasteful number, since it uses less digits than its factorization.

61764100551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401566 (or 2401563 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 61764100551 in words is "sixty-one billion, seven hundred sixty-four million, one hundred thousand, five hundred fifty-one".