1554150989644 has 24 divisors (see below), whose sum is σ = 3069326408400. Its totient is φ = 682072534080.

The previous prime is 1554150989579. The next prime is 1554150989663. The reversal of 1554150989644 is 4469890514551.

It is a super-2 number, since 2×1554150989644² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608992059 + ... + 608994610.

It is an arithmetic number, because the mean of its divisors is an integer number (127888600350).

Almost surely, 2^{1554150989644} is an apocalyptic number.

It is an amenable number.

1554150989644 is a deficient number, since it is larger than the sum of its proper divisors (1515175418756).

1554150989644 is a wasteful number, since it uses less digits than its factorization.

1554150989644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217986713 (or 1217986711 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 61.

The spelling of 1554150989644 in words is "one trillion, five hundred fifty-four billion, one hundred fifty million, nine hundred eighty-nine thousand, six hundred forty-four".