61236819646 has 4 divisors (see below), whose sum is σ = 91855229472. Its totient is φ = 30618409822.

The previous prime is 61236819641. The next prime is 61236819689. The reversal of 61236819646 is 64691863216.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 61236819593 and 61236819602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61236819641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15309204910 + ... + 15309204913.

It is an arithmetic number, because the mean of its divisors is an integer number (22963807368).

Almost surely, 2^61236819646 is an apocalyptic number.

61236819646 is a deficient number, since it is larger than the sum of its proper divisors (30618409826).

61236819646 is a wasteful number, since it uses less digits than its factorization.

61236819646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30618409825.

The product of its digits is 2239488, while the sum is 52.

The spelling of 61236819646 in words is "sixty-one billion, two hundred thirty-six million, eight hundred nineteen thousand, six hundred forty-six".