1971154896 has 40 divisors (see below), whose sum is σ = 5391690624. Its totient is φ = 618401280.

The previous prime is 1971154883. The next prime is 1971154897. The reversal of 1971154896 is 6984511791.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971154897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207000 + ... + 1208631.

Almost surely, 2^1971154896 is an apocalyptic number.

1971154896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1971154896 is an abundant number, since it is smaller than the sum of its proper divisors (3420535728).

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

1971154896 is a wasteful number, since it uses less digits than its factorization.

1971154896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415659 (or 2415653 counting only the distinct ones).

The product of its digits is 544320, while the sum is 51.

The square root of 1971154896 is about 44397.6902101900. The cubic root of 1971154896 is about 1253.8346024439.

The spelling of 1971154896 in words is "one billion, nine hundred seventy-one million, one hundred fifty-four thousand, eight hundred ninety-six".