61402235251 has 8 divisors (see below), whose sum is σ = 70395354720. Its totient is φ = 52464458688.

The previous prime is 61402235233. The next prime is 61402235263. The reversal of 61402235251 is 15253220416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61402235251 - 2¹⁹ = 61401710963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61402235201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13833346 + ... + 13837783.

It is an arithmetic number, because the mean of its divisors is an integer number (8799419340).

Almost surely, 2^61402235251 is an apocalyptic number.

61402235251 is a deficient number, since it is larger than the sum of its proper divisors (8993119469).

61402235251 is a wasteful number, since it uses less digits than its factorization.

61402235251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27671453.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 61402235251 its reverse (15253220416), we get a palindrome (76655455667).

The spelling of 61402235251 in words is "sixty-one billion, four hundred two million, two hundred thirty-five thousand, two hundred fifty-one".