157811221454 has 8 divisors (see below), whose sum is σ = 236732330640. Its totient is φ = 78900444576.

The previous prime is 157811221433. The next prime is 157811221481. The reversal of 157811221454 is 454122118751.

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

It is a congruent number.

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, 2544779 + ... + 2606054.

It is an arithmetic number, because the mean of its divisors is an integer number (29591541330).

Almost surely, 2^157811221454 is an apocalyptic number.

157811221454 is a deficient number, since it is larger than the sum of its proper divisors (78921109186).

157811221454 is a wasteful number, since it uses less digits than its factorization.

157811221454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166154.

The product of its digits is 89600, while the sum is 41.

The spelling of 157811221454 in words is "one hundred fifty-seven billion, eight hundred eleven million, two hundred twenty-one thousand, four hundred fifty-four".