78461771511 has 8 divisors (see below), whose sum is σ = 104617183104. Its totient is φ = 52307103800.

The previous prime is 78461771459. The next prime is 78461771543. The reversal of 78461771511 is 11517716487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78461771511 - 2⁷ = 78461771383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78461771111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143560 + ... + 421346.

It is an arithmetic number, because the mean of its divisors is an integer number (13077147888).

Almost surely, 2^78461771511 is an apocalyptic number.

78461771511 is a deficient number, since it is larger than the sum of its proper divisors (26155411593).

78461771511 is a wasteful number, since it uses less digits than its factorization.

78461771511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371941.

The product of its digits is 329280, while the sum is 48.

The spelling of 78461771511 in words is "seventy-eight billion, four hundred sixty-one million, seven hundred seventy-one thousand, five hundred eleven".