61348632421251 has 64 divisors (see below), whose sum is σ = 102385471979520. Its totient is φ = 31864325460480.

The previous prime is 61348632421249. The next prime is 61348632421259. The reversal of 61348632421251 is 15212423684316.

It is a happy number.

It is not a de Polignac number, because 61348632421251 - 2¹ = 61348632421249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61348632421251.

It is not an unprimeable number, because it can be changed into a prime (61348632421259) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 301731 + ... + 11080988.

It is an arithmetic number, because the mean of its divisors is an integer number (1599772999680).

Almost surely, 2^{61348632421251} is an apocalyptic number.

61348632421251 is a deficient number, since it is larger than the sum of its proper divisors (41036839558269).

61348632421251 is a wasteful number, since it uses less digits than its factorization.

61348632421251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11383264.

The product of its digits is 1658880, while the sum is 48.

The spelling of 61348632421251 in words is "sixty-one trillion, three hundred forty-eight billion, six hundred thirty-two million, four hundred twenty-one thousand, two hundred fifty-one".