161687960370 has 48 divisors (see below), whose sum is σ = 420414546240. Its totient is φ = 43114138272.

The previous prime is 161687960363. The next prime is 161687960377. The reversal of 161687960370 is 73069786161.

It is a happy number.

161687960370 is a `hidden beast` number, since 16 + 16 + 8 + 7 + 9 + 603 + 7 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (161687960363) and next prime (161687960377).

It is a super-2 number, since 2×161687960370² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161687960377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1738387 + ... + 1829033.

It is an arithmetic number, because the mean of its divisors is an integer number (8758636380).

Almost surely, 2^161687960370 is an apocalyptic number.

161687960370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161687960370 is an abundant number, since it is smaller than the sum of its proper divisors (258726585870).

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

161687960370 is a wasteful number, since it uses less digits than its factorization.

161687960370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110479 (or 110476 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 161687960370 in words is "one hundred sixty-one billion, six hundred eighty-seven million, nine hundred sixty thousand, three hundred seventy".