996725185501 has 4 divisors (see below), whose sum is σ = 996727681404. Its totient is φ = 996722689600.

The previous prime is 996725185481. The next prime is 996725185517. The reversal of 996725185501 is 105581527699.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 256591889401 + 740133296100 = 506549^2 + 860310^2 .

It is a 3-Lehmer number, since φ(996725185501) divides (996725185501-1)³.

It is a cyclic number.

It is not a de Polignac number, because 996725185501 - 2¹⁵ = 996725152733 is a prime.

It is a super-2 number, since 2×996725185501² (a number of 25 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 (996725185531) 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, 499180 + ... + 1497541.

It is an arithmetic number, because the mean of its divisors is an integer number (249181920351).

Almost surely, 2^996725185501 is an apocalyptic number.

996725185501 is the 499181-st decagonal number.

It is an amenable number.

996725185501 is a deficient number, since it is larger than the sum of its proper divisors (2495903).

996725185501 is a wasteful number, since it uses less digits than its factorization.

996725185501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495902.

The product of its (nonzero) digits is 6804000, while the sum is 58.

The spelling of 996725185501 in words is "nine hundred ninety-six billion, seven hundred twenty-five million, one hundred eighty-five thousand, five hundred one".