1915154556 has 48 divisors (see below), whose sum is σ = 5116151040. Its totient is φ = 546215040.

The previous prime is 1915154537. The next prime is 1915154641. The reversal of 1915154556 is 6554515191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28000 + ... + 67928.

It is an arithmetic number, because the mean of its divisors is an integer number (106586480).

Almost surely, 2^1915154556 is an apocalyptic number.

It is an amenable number.

1915154556 is an abundant number, since it is smaller than the sum of its proper divisors (3200996484).

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

1915154556 is a wasteful number, since it uses less digits than its factorization.

1915154556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40514 (or 40512 counting only the distinct ones).

The product of its digits is 135000, while the sum is 42.

The square root of 1915154556 is about 43762.4788603205. The cubic root of 1915154556 is about 1241.8465715291.

The spelling of 1915154556 in words is "one billion, nine hundred fifteen million, one hundred fifty-four thousand, five hundred fifty-six".