78461398153 has 4 divisors (see below), whose sum is σ = 78462999760. Its totient is φ = 78459796548.

The previous prime is 78461398139. The next prime is 78461398159. The reversal of 78461398153 is 35189316487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78461398153 is a prime.

It is a super-2 number, since 2×78461398153² (a number of 23 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 = 78461398094 and 78461398103.

It is not an unprimeable number, because it can be changed into a prime (78461398159) 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, 724923 + ... + 826096.

It is an arithmetic number, because the mean of its divisors is an integer number (19615749940).

Almost surely, 2^78461398153 is an apocalyptic number.

It is an amenable number.

78461398153 is a deficient number, since it is larger than the sum of its proper divisors (1601607).

78461398153 is a wasteful number, since it uses less digits than its factorization.

78461398153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601606.

The product of its digits is 4354560, while the sum is 55.

The spelling of 78461398153 in words is "seventy-eight billion, four hundred sixty-one million, three hundred ninety-eight thousand, one hundred fifty-three".