78148477484187 has 32 divisors (see below), whose sum is σ = 114007448056320. Its totient is φ = 47222370912000.

The previous prime is 78148477484167. The next prime is 78148477484267.

78148477484187 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78148477484187 - 2²⁰ = 78148476435611 is a prime.

It is a super-2 number, since 2×78148477484187² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78148477484167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66244237 + ... + 67413617.

It is an arithmetic number, because the mean of its divisors is an integer number (3562732751760).

Almost surely, 2^{78148477484187} is an apocalyptic number.

78148477484187 is a deficient number, since it is larger than the sum of its proper divisors (35858970572133).

78148477484187 is a wasteful number, since it uses less digits than its factorization.

78148477484187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175395.

The product of its digits is 2517630976, while the sum is 78.

The spelling of 78148477484187 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred seventy-seven million, four hundred eighty-four thousand, one hundred eighty-seven".