1554780156 has 12 divisors (see below), whose sum is σ = 3627820392. Its totient is φ = 518260048.

The previous prime is 1554780131. The next prime is 1554780211. The reversal of 1554780156 is 6510874551.

It is a tau number, because it is divible by the number of its divisors (12).

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, 64782495 + ... + 64782518.

It is an arithmetic number, because the mean of its divisors is an integer number (302318366).

Almost surely, 2^1554780156 is an apocalyptic number.

It is an amenable number.

1554780156 is an abundant number, since it is smaller than the sum of its proper divisors (2073040236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1554780156 is a wasteful number, since it uses less digits than its factorization.

1554780156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129565020 (or 129565018 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 42.

The square root of 1554780156 is about 39430.7006785322. The cubic root of 1554780156 is about 1158.4829941895.

It can be divided in two parts, 15547 and 80156, that added together give a triangular number (95703 = T₄₃₇).

The spelling of 1554780156 in words is "one billion, five hundred fifty-four million, seven hundred eighty thousand, one hundred fifty-six".