61283388551 has 12 divisors (see below), whose sum is σ = 77769644040. Its totient is φ = 47753289360.

The previous prime is 61283388541. The next prime is 61283388589. The reversal of 61283388551 is 15588338216.

It is a happy number.

It is not a de Polignac number, because 61283388551 - 2⁶ = 61283388487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61283388551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61283388541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56848616 + ... + 56849693.

It is an arithmetic number, because the mean of its divisors is an integer number (6480803670).

Almost surely, 2^61283388551 is an apocalyptic number.

61283388551 is a deficient number, since it is larger than the sum of its proper divisors (16486255489).

61283388551 is a wasteful number, since it uses less digits than its factorization.

61283388551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113698334 (or 113698327 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 50.

The spelling of 61283388551 in words is "sixty-one billion, two hundred eighty-three million, three hundred eighty-eight thousand, five hundred fifty-one".