30478137861 has 16 divisors (see below), whose sum is σ = 42979082240. Its totient is φ = 19158113520.

The previous prime is 30478137857. The next prime is 30478137901. The reversal of 30478137861 is 16873187403.

It is not a de Polignac number, because 30478137861 - 2² = 30478137857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30478137861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30478137961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1255045 + ... + 1279098.

It is an arithmetic number, because the mean of its divisors is an integer number (2686192640).

Almost surely, 2^30478137861 is an apocalyptic number.

It is an amenable number.

30478137861 is a deficient number, since it is larger than the sum of its proper divisors (12500944379).

30478137861 is a wasteful number, since it uses less digits than its factorization.

30478137861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534376.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 30478137861 in words is "thirty billion, four hundred seventy-eight million, one hundred thirty-seven thousand, eight hundred sixty-one".