61763157631 has 4 divisors (see below), whose sum is σ = 70586465872. Its totient is φ = 52939849392.

The previous prime is 61763157611. The next prime is 61763157661. The reversal of 61763157631 is 13675136716.

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

It is a cyclic number.

It is not a de Polignac number, because 61763157631 - 2²¹ = 61761060479 is a prime.

It is a super-2 number, since 2×61763157631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61763157611) 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, 4411654110 + ... + 4411654123.

It is an arithmetic number, because the mean of its divisors is an integer number (17646616468).

Almost surely, 2^61763157631 is an apocalyptic number.

61763157631 is a deficient number, since it is larger than the sum of its proper divisors (8823308241).

61763157631 is an equidigital number, since it uses as much as digits as its factorization.

61763157631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8823308240.

The product of its digits is 476280, while the sum is 46.

The spelling of 61763157631 in words is "sixty-one billion, seven hundred sixty-three million, one hundred fifty-seven thousand, six hundred thirty-one".