72078341402 has 4 divisors (see below), whose sum is σ = 108117512106. Its totient is φ = 36039170700.

The previous prime is 72078341389. The next prime is 72078341411. The reversal of 72078341402 is 20414387027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20414387027 = 1873 ⋅10899299.

It can be written as a sum of positive squares in only one way, i.e., 47960562001 + 24117779401 = 218999^2 + 155299^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18019585349 + ... + 18019585352.

Almost surely, 2^72078341402 is an apocalyptic number.

72078341402 is a deficient number, since it is larger than the sum of its proper divisors (36039170704).

72078341402 is a wasteful number, since it uses less digits than its factorization.

72078341402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36039170703.

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 72078341402 in words is "seventy-two billion, seventy-eight million, three hundred forty-one thousand, four hundred two".