78362215406 has 4 divisors (see below), whose sum is σ = 117543323112. Its totient is φ = 39181107702.

The previous prime is 78362215403. The next prime is 78362215409. The reversal of 78362215406 is 60451226387.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78362215403) and next prime (78362215409).

It is a super-2 number, since 2×78362215406² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78362215403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19590553850 + ... + 19590553853.

It is an arithmetic number, because the mean of its divisors is an integer number (29385830778).

Almost surely, 2^78362215406 is an apocalyptic number.

78362215406 is a deficient number, since it is larger than the sum of its proper divisors (39181107706).

78362215406 is a wasteful number, since it uses less digits than its factorization.

78362215406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39181107705.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 78362215406 in words is "seventy-eight billion, three hundred sixty-two million, two hundred fifteen thousand, four hundred six".