35478139978 has 8 divisors (see below), whose sum is σ = 53574372900. Its totient is φ = 17620015680.

The previous prime is 35478139969. The next prime is 35478139981. The reversal of 35478139978 is 87993187453.

It can be written as a sum of positive squares in 2 ways, for example, as 33597790209 + 1880349769 = 183297^2 + 43363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59526783 + ... + 59527378.

Almost surely, 2^35478139978 is an apocalyptic number.

35478139978 is a deficient number, since it is larger than the sum of its proper divisors (18096232922).

35478139978 is a wasteful number, since it uses less digits than its factorization.

35478139978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119054312.

The product of its digits is 45722880, while the sum is 64.

The spelling of 35478139978 in words is "thirty-five billion, four hundred seventy-eight million, one hundred thirty-nine thousand, nine hundred seventy-eight".