61972563443 has 8 divisors (see below), whose sum is σ = 71986865760. Its totient is φ = 52248530880.

The previous prime is 61972563431. The next prime is 61972563451. The reversal of 61972563443 is 34436527916.

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

It is not a de Polignac number, because 61972563443 - 2¹² = 61972559347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61972563391 and 61972563400.

It is not an unprimeable number, because it can be changed into a prime (61972563943) 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, 72566978 + ... + 72567831.

It is an arithmetic number, because the mean of its divisors is an integer number (8998358220).

Almost surely, 2^61972563443 is an apocalyptic number.

61972563443 is a deficient number, since it is larger than the sum of its proper divisors (10014302317).

61972563443 is a wasteful number, since it uses less digits than its factorization.

61972563443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145134877.

The product of its digits is 3265920, while the sum is 50.

The spelling of 61972563443 in words is "sixty-one billion, nine hundred seventy-two million, five hundred sixty-three thousand, four hundred forty-three".