61625709943 has 4 divisors (see below), whose sum is σ = 70429382800. Its totient is φ = 52822037088.

The previous prime is 61625709917. The next prime is 61625709947. The reversal of 61625709943 is 34990752616.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61625709943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61625709947) 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, 4401836418 + ... + 4401836431.

It is an arithmetic number, because the mean of its divisors is an integer number (17607345700).

Almost surely, 2^61625709943 is an apocalyptic number.

61625709943 is a deficient number, since it is larger than the sum of its proper divisors (8803672857).

61625709943 is an equidigital number, since it uses as much as digits as its factorization.

61625709943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8803672856.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 61625709943 in words is "sixty-one billion, six hundred twenty-five million, seven hundred nine thousand, nine hundred forty-three".