1961573670 has 192 divisors, whose sum is σ = 6147588096. Its totient is φ = 424465920.

The previous prime is 1961573657. The next prime is 1961573671. The reversal of 1961573670 is 763751691.

1961573670 is a `hidden beast` number, since 1 + 9 + 6 + 1 + 573 + 6 + 70 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961573671) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 916842 + ... + 918978.

It is an arithmetic number, because the mean of its divisors is an integer number (32018688).

Almost surely, 2^1961573670 is an apocalyptic number.

1961573670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1961573670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3073794048).

1961573670 is an abundant number, since it is smaller than the sum of its proper divisors (4186014426).

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

1961573670 is a wasteful number, since it uses less digits than its factorization.

1961573670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235 (or 2232 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 1961573670 is about 44289.6564673965. The cubic root of 1961573670 is about 1251.7997902935.

The spelling of 1961573670 in words is "one billion, nine hundred sixty-one million, five hundred seventy-three thousand, six hundred seventy".