61451462519 has 16 divisors (see below), whose sum is σ = 67008060000. Its totient is φ = 56159009280.

The previous prime is 61451462509. The next prime is 61451462531. The reversal of 61451462519 is 91526415416.

It is a cyclic number.

It is not a de Polignac number, because 61451462519 - 2²⁴ = 61434685303 is a prime.

It is a super-2 number, since 2×61451462519² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61451462519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61451462509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373844 + ... + 512505.

It is an arithmetic number, because the mean of its divisors is an integer number (4188003750).

Almost surely, 2^61451462519 is an apocalyptic number.

61451462519 is a deficient number, since it is larger than the sum of its proper divisors (5556597481).

61451462519 is a wasteful number, since it uses less digits than its factorization.

61451462519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886498.

The product of its digits is 259200, while the sum is 44.

The spelling of 61451462519 in words is "sixty-one billion, four hundred fifty-one million, four hundred sixty-two thousand, five hundred nineteen".