6401556154 has 16 divisors (see below), whose sum is σ = 10982707200. Its totient is φ = 2741371344.

The previous prime is 6401556131. The next prime is 6401556211. The reversal of 6401556154 is 4516551046.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160849 + ... + 196660.

It is an arithmetic number, because the mean of its divisors is an integer number (686419200).

Almost surely, 2^6401556154 is an apocalyptic number.

6401556154 is a deficient number, since it is larger than the sum of its proper divisors (4581151046).

6401556154 is a wasteful number, since it uses less digits than its factorization.

6401556154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358797.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 6401556154 is about 80009.7253713572. The cubic root of 6401556154 is about 1856.7860009802.

The spelling of 6401556154 in words is "six billion, four hundred one million, five hundred fifty-six thousand, one hundred fifty-four".