1657989854948 has 72 divisors (see below), whose sum is σ = 3533143186944. Its totient is φ = 677960236800.

The previous prime is 1657989854921. The next prime is 1657989854953. The reversal of 1657989854948 is 8494589897561.

It is a super-2 number, since 2×1657989854948² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1490261 + ... + 2353052.

It is an arithmetic number, because the mean of its divisors is an integer number (49071433152).

Almost surely, 2^{1657989854948} is an apocalyptic number.

It is an amenable number.

1657989854948 is an abundant number, since it is smaller than the sum of its proper divisors (1875153331996).

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

1657989854948 is a wasteful number, since it uses less digits than its factorization.

1657989854948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843433 (or 3843424 counting only the distinct ones).

The product of its digits is 6270566400, while the sum is 83.

The spelling of 1657989854948 in words is "one trillion, six hundred fifty-seven billion, nine hundred eighty-nine million, eight hundred fifty-four thousand, nine hundred forty-eight".