78361723461 has 32 divisors (see below), whose sum is σ = 124076670976. Its totient is φ = 43046640000.

The previous prime is 78361723409. The next prime is 78361723463. The reversal of 78361723461 is 16432716387.

It is not a de Polignac number, because 78361723461 - 2¹⁸ = 78361461317 is a prime.

It is a super-2 number, since 2×78361723461² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78361723461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78361723463) 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, 300280 + ... + 496881.

It is an arithmetic number, because the mean of its divisors is an integer number (3877395968).

Almost surely, 2^78361723461 is an apocalyptic number.

It is an amenable number.

78361723461 is a deficient number, since it is larger than the sum of its proper divisors (45714947515).

78361723461 is a wasteful number, since it uses less digits than its factorization.

78361723461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797353.

The product of its digits is 1016064, while the sum is 48.

The spelling of 78361723461 in words is "seventy-eight billion, three hundred sixty-one million, seven hundred twenty-three thousand, four hundred sixty-one".