61484907749 has 4 divisors (see below), whose sum is σ = 61862115936. Its totient is φ = 61107699564.

The previous prime is 61484907721. The next prime is 61484907761. The reversal of 61484907749 is 94770948416.

It is a happy number.

61484907749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61484907749 - 2⁸ = 61484907493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61484907349) 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, 188603849 + ... + 188604174.

It is an arithmetic number, because the mean of its divisors is an integer number (15465528984).

Almost surely, 2^61484907749 is an apocalyptic number.

It is an amenable number.

61484907749 is a deficient number, since it is larger than the sum of its proper divisors (377208187).

61484907749 is a wasteful number, since it uses less digits than its factorization.

61484907749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377208186.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 61484907749 in words is "sixty-one billion, four hundred eighty-four million, nine hundred seven thousand, seven hundred forty-nine".