1961558402 has 8 divisors (see below), whose sum is σ = 2942588736. Its totient is φ = 980695492.

The previous prime is 1961558303. The next prime is 1961558407. The reversal of 1961558402 is 2048551691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1961558402² = 7695422728913587208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1961558402.

It is not an unprimeable number, because it can be changed into a prime (1961558407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6638 + ... + 62985.

It is an arithmetic number, because the mean of its divisors is an integer number (367823592).

Almost surely, 2^1961558402 is an apocalyptic number.

1961558402 is a deficient number, since it is larger than the sum of its proper divisors (981030334).

1961558402 is a wasteful number, since it uses less digits than its factorization.

1961558402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83712.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 1961558402 is about 44289.4841017594. The cubic root of 1961558402 is about 1251.7965424711.

The spelling of 1961558402 in words is "one billion, nine hundred sixty-one million, five hundred fifty-eight thousand, four hundred two".