78571354647461 has 24 divisors (see below), whose sum is σ = 89327667638880. Its totient is φ = 68981287991616.

The previous prime is 78571354647433. The next prime is 78571354647463. The reversal of 78571354647461 is 16474645317587.

It is a happy number.

It is not a de Polignac number, because 78571354647461 - 2¹⁰ = 78571354646437 is a prime.

It is a super-2 number, since 2×78571354647461² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78571354647391 and 78571354647400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78571354647463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119311175 + ... + 119967908.

It is an arithmetic number, because the mean of its divisors is an integer number (3721986151620).

Almost surely, 2^{78571354647461} is an apocalyptic number.

It is an amenable number.

78571354647461 is a deficient number, since it is larger than the sum of its proper divisors (10756312991419).

78571354647461 is a wasteful number, since it uses less digits than its factorization.

78571354647461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239279205 (or 239279192 counting only the distinct ones).

The product of its digits is 474163200, while the sum is 68.

The spelling of 78571354647461 in words is "seventy-eight trillion, five hundred seventy-one billion, three hundred fifty-four million, six hundred forty-seven thousand, four hundred sixty-one".