2154104623402 has 4 divisors (see below), whose sum is σ = 3231156935106. Its totient is φ = 1077052311700.

The previous prime is 2154104623343. The next prime is 2154104623439. The reversal of 2154104623402 is 2043264014512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1718146829961 + 435957793441 = 1310781^2 + 660271^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538526155849 + ... + 538526155852.

Almost surely, 2^{2154104623402} is an apocalyptic number.

2154104623402 is a deficient number, since it is larger than the sum of its proper divisors (1077052311704).

2154104623402 is a wasteful number, since it uses less digits than its factorization.

2154104623402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077052311703.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 2154104623402 its reverse (2043264014512), we get a palindrome (4197368637914).

The spelling of 2154104623402 in words is "two trillion, one hundred fifty-four billion, one hundred four million, six hundred twenty-three thousand, four hundred two".