61972251383 has 4 divisors (see below), whose sum is σ = 70825430160. Its totient is φ = 53119072608.

The previous prime is 61972251371. The next prime is 61972251409. The reversal of 61972251383 is 38315227916.

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

It is not a de Polignac number, because 61972251383 - 2⁸ = 61972251127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61972253383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4426589378 + ... + 4426589391.

It is an arithmetic number, because the mean of its divisors is an integer number (17706357540).

Almost surely, 2^61972251383 is an apocalyptic number.

61972251383 is a deficient number, since it is larger than the sum of its proper divisors (8853178777).

61972251383 is an equidigital number, since it uses as much as digits as its factorization.

61972251383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8853178776.

The product of its digits is 544320, while the sum is 47.

The spelling of 61972251383 in words is "sixty-one billion, nine hundred seventy-two million, two hundred fifty-one thousand, three hundred eighty-three".