61946436491 has 8 divisors (see below), whose sum is σ = 63298464768. Its totient is φ = 60607729000.

The previous prime is 61946436449. The next prime is 61946436499. The reversal of 61946436491 is 19463464916.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61946436491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61946436499) 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, 3320795 + ... + 3339396.

It is an arithmetic number, because the mean of its divisors is an integer number (7912308096).

Almost surely, 2^61946436491 is an apocalyptic number.

61946436491 is a deficient number, since it is larger than the sum of its proper divisors (1352028277).

61946436491 is a wasteful number, since it uses less digits than its factorization.

61946436491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660393.

The product of its digits is 3359232, while the sum is 53.

The spelling of 61946436491 in words is "sixty-one billion, nine hundred forty-six million, four hundred thirty-six thousand, four hundred ninety-one".