61520858467 has 4 divisors (see below), whose sum is σ = 61608620736. Its totient is φ = 61433096200.

The previous prime is 61520858417. The next prime is 61520858479. The reversal of 61520858467 is 76485802516.

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-61520858467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61520858407) 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, 43880083 + ... + 43881484.

It is an arithmetic number, because the mean of its divisors is an integer number (15402155184).

Almost surely, 2^61520858467 is an apocalyptic number.

61520858467 is a deficient number, since it is larger than the sum of its proper divisors (87762269).

61520858467 is an equidigital number, since it uses as much as digits as its factorization.

61520858467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87762268.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 61520858467 in words is "sixty-one billion, five hundred twenty million, eight hundred fifty-eight thousand, four hundred sixty-seven".