1961456057 has 16 divisors (see below), whose sum is σ = 2177613504. Its totient is φ = 1751880000.

The previous prime is 1961456047. The next prime is 1961456071. The reversal of 1961456057 is 7506541691.

It is a cyclic number.

It is not a de Polignac number, because 1961456057 - 2²² = 1957261753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1961455999 and 1961456017.

It is not an unprimeable number, because it can be changed into a prime (1961456047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138803 + ... + 152279.

It is an arithmetic number, because the mean of its divisors is an integer number (136100844).

Almost surely, 2^1961456057 is an apocalyptic number.

It is an amenable number.

1961456057 is a deficient number, since it is larger than the sum of its proper divisors (216157447).

1961456057 is a wasteful number, since it uses less digits than its factorization.

1961456057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13720.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 1961456057 is about 44288.3286769776. The cubic root of 1961456057 is about 1251.7747711174.

It can be divided in two parts, 196145 and 6057, that added together give a palindrome (202202).

The spelling of 1961456057 in words is "one billion, nine hundred sixty-one million, four hundred fifty-six thousand, fifty-seven".