61464431163418 has 4 divisors (see below), whose sum is σ = 92196646745130. Its totient is φ = 30732215581708.

The previous prime is 61464431163413. The next prime is 61464431163437. The reversal of 61464431163418 is 81436113446416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61202724229089 + 261706934329 = 7823217^2 + 511573^2 .

It is not an unprimeable number, because it can be changed into a prime (61464431163413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15366107790853 + ... + 15366107790856.

Almost surely, 2^{61464431163418} is an apocalyptic number.

61464431163418 is a deficient number, since it is larger than the sum of its proper divisors (30732215581712).

61464431163418 is a wasteful number, since it uses less digits than its factorization.

61464431163418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30732215581711.

The product of its digits is 3981312, while the sum is 52.

The spelling of 61464431163418 in words is "sixty-one trillion, four hundred sixty-four billion, four hundred thirty-one million, one hundred sixty-three thousand, four hundred eighteen".