61236012490 has 8 divisors (see below), whose sum is σ = 110224822500. Its totient is φ = 24494404992.

The previous prime is 61236012463. The next prime is 61236012547. The reversal of 61236012490 is 9421063216.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53623275489 + 7612737001 = 231567^2 + 87251^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3061800615 + ... + 3061800634.

Almost surely, 2^61236012490 is an apocalyptic number.

61236012490 is a deficient number, since it is larger than the sum of its proper divisors (48988810010).

61236012490 is a wasteful number, since it uses less digits than its factorization.

61236012490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123601256.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 61236012490 in words is "sixty-one billion, two hundred thirty-six million, twelve thousand, four hundred ninety".