61204669451 has 4 divisors (see below), whose sum is σ = 61205243904. Its totient is φ = 61204095000.

The previous prime is 61204669403. The next prime is 61204669453. The reversal of 61204669451 is 15496640216.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61204669451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61204669453) 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, 75275 + ... + 357876.

It is an arithmetic number, because the mean of its divisors is an integer number (15301310976).

Almost surely, 2^61204669451 is an apocalyptic number.

61204669451 is a deficient number, since it is larger than the sum of its proper divisors (574453).

61204669451 is a wasteful number, since it uses less digits than its factorization.

61204669451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574452.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 61204669451 in words is "sixty-one billion, two hundred four million, six hundred sixty-nine thousand, four hundred fifty-one".