61578650467 has 4 divisors (see below), whose sum is σ = 64255983120. Its totient is φ = 58901317816.

The previous prime is 61578650447. The next prime is 61578650479. The reversal of 61578650467 is 76405687516.

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

It is a cyclic number.

It is not a de Polignac number, because 61578650467 - 2¹⁵ = 61578617699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61578650407) 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, 1338666292 + ... + 1338666337.

It is an arithmetic number, because the mean of its divisors is an integer number (16063995780).

Almost surely, 2^61578650467 is an apocalyptic number.

61578650467 is a deficient number, since it is larger than the sum of its proper divisors (2677332653).

61578650467 is a wasteful number, since it uses less digits than its factorization.

61578650467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677332652.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 61578650467 in words is "sixty-one billion, five hundred seventy-eight million, six hundred fifty thousand, four hundred sixty-seven".