61420621436 has 6 divisors (see below), whose sum is σ = 107486087520. Its totient is φ = 30710310716.

The previous prime is 61420621433. The next prime is 61420621441. The reversal of 61420621436 is 63412602416.

It is a junction number, because it is equal to n+sod(n) for n = 61420621396 and 61420621405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61420621433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7677577676 + ... + 7677577683.

It is an arithmetic number, because the mean of its divisors is an integer number (17914347920).

Almost surely, 2^61420621436 is an apocalyptic number.

It is an amenable number.

61420621436 is a deficient number, since it is larger than the sum of its proper divisors (46065466084).

61420621436 is a wasteful number, since it uses less digits than its factorization.

61420621436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15355155363 (or 15355155361 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 61420621436 in words is "sixty-one billion, four hundred twenty million, six hundred twenty-one thousand, four hundred thirty-six".